This list of trilobites is a comprehensive listing of all genera

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 that have ever been included in the class Trilobita

Trilobite

Trilobites are a well-known fossil group of extinct marine arthropods that form the class Trilobita. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period , and they flourished throughout the lower Paleozoic era before...

, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful , or were not formally published , as well as junior synonyms of more established names, and genera that are no longer considered trilobites.

Naming conventions and terminology

Naming conventions and terminology follow the International Code of Zoological Nomenclature

International Code of Zoological Nomenclature

The International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...

. Technical terms used include:

• Junior synonym: A name which describes the same taxon as a previously published name. If two or more genera are formally designated and the type specimens are later assigned to the same genus, the first to be published (in chronological order) is the senior synonym, and all other instances are junior synonyms. Senior synonyms are generally used, except by special decision of the ICZN, but junior synonyms cannot be used again, even if deprecated. Junior synonymy is often subjective, unless the genera described were both based on the same type specimen.
• (Latin for "naked name"): A name that has appeared in print but has not yet been formally published by the standards of the ICZN. (the plural form) are invalid, and are therefore not italicized as a proper generic name would be. If the name is later formally published, that name is no longer a and will be italicized on this list. Often, the formally published name will differ from any that describe the same specimen.
• (Latin for "forgotten name"): A name that has not been used in the scientific community for more than fifty years after its original proposal.
• Preoccupied name: A name that is formally published, but which has already been used for another taxon. This second use is invalid (as are all subsequent uses) and the name must be replaced. As preoccupied names are not valid generic names, they will also go unitalicized on this list.
• (Latin for "dubious name"): A name describing a fossil with no unique diagnostic features. As this can be an extremely subjective and controversial designation, this term is not used on this list.

A

:

:

Ab

• Abadiella (=Parabadiella; =Danagouia)
• Abakania
  Abakania
  Abakania is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Abakanopleura
• Abakolia (=Costadiscus)
• Abdulinaspis
• Abharella

Ac

• Acadolenus
• Acadoparadoxides (=Entomolithus; =Entomostracites; =Eoparadoxides)
• Acanthalomina
• Acanthocephalus (=Alomataspis)
• Acanthometopus
• Acanthomicmacca (=Chengkouia; =Jaskovitchella; =Myopsomicmacca)
• Acanthoparypha
• Acanthophillipsia
• Acanthopleurella
• Acanthopyge
  Acanthopyge
  Acanthopyge is an extinct genus of trilobite that lived during the Devonian. Only a handful of complete specimens from Morocco and very few A. Consanguinea have been found...
  
   (=Euarges)
• Acastava
  Acastava
  Acastava is an extinct genus of trilobite in the order Phacopida, from the upper Pragian period of the Devonian.-External links:* at the Paleobiology Database...
  
  
• Acaste
  Acaste (genus)
  Acaste is a genus of extinct trilobite of the order Phacopida which lived throughout the Silurian period. They are characterized by a convex dorsal surface, an absence of spines, a shortening of the head-shield and a general rounding off of all angles . Species include Acaste downingiae and...
  
  
• Acastella
  Acastella
  Acastella is an extinct genus of trilobite. It contains six species, A. heberti, A. jacquemonti, A. prima, A. roualti, A. tanzidensis, A. tiro.-External links:* at the Paleobiology Database...
  
  
• Acastellina
  Acastellina
  Acastellina is a genus of trilobite in the order Phacopida, which existed in what is now Germany. It was described by Richter and Richter in 1954. The type species is Acastellina nolens, originally described as a species of Acastella....
  
  
• Acastocephala
  Acastocephala
  Acastocephala is a genus of trilobite from the middle Silurian.-Sources:* * *...
  
  
• Acastoides
  Acastoides
  Acastoides is an extinct genus of trilobite of the Devonian found in Morocco.-External links:** at the Paleobiology Database...
  
  
• Acastopyge
  Acastopyge
  Acastopyge is a genus of trilobite in the order Phacopida, which existed in what is now Poland. It was named by E. Tomczykowa in 1974, and the type species is Acastopyge shergoldi.-External links:* at the Paleobiology Database...
  
  
• Acernaspis
  Acernaspis
  Acernaspis is an extinct genus Silurian of Trilobite. It contains two species, A. elliptifrons, and A. salmoensis. It is sometimes found preserved in burrows of various forms, sometimes in association with multiple moults, suggesting that it used the tunnels as refugia whilst in its vulnerable...
  
   (=Eskaspis; =Otadenus; =Murphycops)
• Acerocare
• Acerocarina (=Cyclognathus)
• Aceroproetus
• Achatella
  Achatella
  Achatella is a genus of trilobite in the order Phacopida, which existed in what is now Ontario, Canada. It was named by Delo in 1935, and the type species is Achatella achates, which was originally assigned to the genus Dalmanites by Billings in 1860...
  
  
• Acheilops
• Acheilus
• Achlysopsis
• Aciculolenus
• Acidaspidella
• Acidaspides
• Acidaspidina
• Acidaspis
  Acidaspis
  Acidaspis is an extinct genus of Odontopleurid trilobite from North America and Europe. Although small, it had long spines along its body....
  
  
• Acidiphorus (=Goniotelina; =Goniotelus; =Goniurus)
• Acidiscus
  Acidiscus
  Acidiscus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Acimetopus
  Acimetopus
  Acimetopus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Acmarhachis
  Acmarhachis
  Acmarhachis is a genus of trilobite in the order Agnostida, which existed in what is now Alabama, United States. It was described by Resser in 1938, and the type species is Acmarhachis typicalis....
  
   (=Cyclagnostus; =Oxyagnostus; =Wanagnostus)
• Acontheus
  Acontheus
  Acontheus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
   (=Aneucanthus; =Aneuacanthus)
• Acrocephalaspina
• Acrocephalaspis
• Acrocephalella
  Acrocephalella
  Acrocephalella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Acrocephalina
• Acrocephalinella
• Acrocephalites (=Acantholenus)
• Acrocephalops
• Acrodirotes
  Acrodirotes
  Acrodirotes is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501-490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Acropyge
• Actinopeltis
• Acuticryphops
• Acutimetopus

Ae

• Aedotes
• Aegrotocatellus
  Aegrotocatellus
  Aegrotocatellus is a genus of trilobite in the order Phacopida, which existed in what is now Nunavut, Canada. It was named by Adrain and Edgecombe in 1995, and the type species is Aegrotocatellus jaggeri, a species named after British musician Mick Jagger.-External links:* at the Paleobiology...
  
  
• Aegunaspis
• Aethedionide
• Aethia
• Aethochuangia

Ag

• Agasella
• Agaso
• Agelagma (?=Paradistazeris)
• Agerina (=Otarionellina; =Otarionella)
• Agnostardis
• Agnostogonus
  Agnostogonus
  Agnostogonus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Agnostotes
• Agnostus
  Agnostus
  Agnostus is a genus of trilobites that lived approximately 540 to 438 million years ago. The agnostids were small , with two thoracic segments and a large tail....
  
   (=Battus; =Acutatagnostus)
• Agraulos (=Arion; =Arionius; =Arionides; =Arionellus; =Agrauloides)
• Aguaraya
  Aguaraya
  Aguaraya is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Aguilarella
• Agyrenella

Ai

• Aiaiaspis
• Aidarella
• Aikhaliella
• Ainasuella
• Aistagnostus
  Aistagnostus
  Aistagnostus is a genus of trilobite in the order Agnostida, which existed in what is now Xinjiang, China. It was described by Xiang and Zhang in 1985, and the type species is Aistagnostus laevigatus....
  
  

Ak

• Akantharges
• Akbashichia
  Akbashichia
  Akbashichia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Aksayaspis
• Aksuaspis
• Aktugaiella

Al

• Alacephalus
• Alanisia
• Alaskadiscus
• Alaskalethe
• Alataupleura
• Alataurus
  Alataurus
  Alataurus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Albansia
  Albansia
  Albansia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Albertella
• Albertellina
• Albertelloides (=Chuchiaspis)
• Alberticoryphe
• Alborsella
• Alceste
• Alcymene
• Aldanaspis
  Aldanaspis
  Aldanaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Aldonaia
• Alekcinella
• Aligerites
• Allobodochus
• Alloillaenus
• Alloleiostegium
• Allolichas
• Alokistocare (=Pseudoalokistocare)
• Alokistocarella
• Alokistocaropsis
• Altaepeltis
• Altaesajania
• Altaiaspis
• Altajaspis
• Altikolia
• Altiocculus
• Altiplanelaspis
• Altitudella
  Altitudella
  Altitudella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Alueva
• Alwynulus
  Alwynulus
  Alwynulus is a genus of trilobite in the order Phacopida, which existed in what is now Scotland. It was described by Tripp in 1967, and the type species is Alwynulus peregrinus.-External links:* at the Paleobiology Database...
  
  

Am

• Amblycranium
• Ambonolium
• Amecephalina
• Amecephalites
• Amecephaloides
• Amecephalus (=Strotocephalus)
• Amechilus
• Ameropiltonia
• Ameura
• Amgaspidella
• Amgaspis
• Amginia
• Amginoerbia
• Amginouyia
• Amiaspis
• Amicus
• Ammagnostus (=Lispagnostus; =Agnostoglossa; =Tentagnostus)
• Amorphella
• Amphilichas (=Paralichas; =Platymetopus; =Acrolichas; =Kerakephalichas; =Tetralichas)
• Amphitryon (=Caphyra Barrande, 1846; =Brachypleura)
• Amphoriops
• Amphoton (=Eurodeois; =Amphotonella; =Paramphoton; =Sunia)
• Ampullatocephalina
• Ampulliglabella
• Ampyx
  Ampyx (trilobite)
  Ampyx is a genus of Asaphid Ordovician-Silurian trilobites. They are characterized by three extended spines on the head-shield. Species include Ampyx linleyensis ....
  
   (=Brachyampyx)
• Ampyxella
• Ampyxina
• Ampyxinella
• Ampyxoides
• Amquia
  Amquia
  Amquia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501-490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Amzasskiella (=Triplacephalus)

An

• Anabaraceps
• Anabaraspis
• Anacaenaspis (=Bruxaspis)
• Anacheiruraspis
• Anacheirurus
• Analox
  Analox
  Analox is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Anambon
• Ananaspis
  Ananaspis
  Ananaspis is a genus of trilobite in the order Phacopida, which existed in what is now the Czech Republic. It was described by Campbell in 1967, and the type species is Ananaspis fecundis, which was originally described as Phacops fecundus communis by Barrande in 1852.-External links:* at the...
  
  
• Anapliomera
• Anasobella
• Anataphrus
• Anaximander
• Anchiopella
  Anchiopella
  Anchiopella is a genus of trilobite in the order Phacopida, which existed in what is now South Africa. It was described by Reed in 1907, and the type species is Anchiopella cristagalli, which was originally described as Encrinurus cristagalli by Woodward in 1873.-External links:* at the...
  
  
• Anchiopsis
  Anchiopsis
  Anchiopsis is a genus of trilobite in the order Phacopida, which existed in what is now New York, U.S.A. It was described by Delo in 1935, and the type species is Anchiopsis anchiops, which was originally described as Calymene anchiops by Green in 1832.-External links:* at the Paleobiology Database...
  
  
• Ancyginaspis
• Ancyropyge
• Andalusiana
• Andegavia (=Sagittapeltis)
• Anderssonella (=Anderssonia)
• Andinacaste
  Andinacaste
  Andinacaste is an extinct genus of trilobite. It contains two species, A. espejensis, and A. legrandi.-External links:* at the Paleobiology Database...
  
  
• Andrarina (=Liostracus)
• Andreaspis
• Anebolithus
  Anebolithus
  Anebolithus is a Trinucleus species of Trilobite found in Gilwern Hill, Powys, Wales.-Features of Trinucleid Trilobites:-External references:http://www.kgg.org.uk/anebolithush.html...
  
  
• Anecocephalus
• Anemocephalops
• Anemocephalus
• Angelina (=Keidelaspis)
• Anglagnostus
  Anglagnostus
  Anglagnostus is a genus of trilobite in the order Agnostida, which existed in what is now Shineton, England. It was described by Howell in 1935, and the type species is Anglagnostus dux, which was originally described as a species of Agnostus....
  
  
• Anglibole
• Angsiduoa
• Angulophacops
• Angustibole
• Angustolenellus
  Angustolenellus
  Angustolenellus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Anhuiaspis
• Anisonotella
• Anisopyge
• Ankoura
• Annamitella (=Bathyuriscops; =Endoaspis; =Wutingia; =Proetiella; =Monella)
• Annamitia
  Annamitia
  Annamitia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Anomocare
• Anomocarella (=Psilaspis; =Entorachis)
• Anomocarellius
• Anomocarina
• Anomocarioides
• Anomocariopsis
• Anopocodia
• Anopolenus
• Anoria
• Antagmella
• Antagmopleura (=Poljakovia)
• Antagmus
• Antatlasia
• Anthracopeltis
• Anujaspis
• Anuloides

Ap

• Apachia (=Apachilites)
• Apatokephalina
• Apatokephaloides
• Apatokephalops (=Aristokainella; =Wanliangtingia)
• Apatokephalus
• Apatolichas
  Apatolichas
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Aphelaspidella
• Aphelaspis (=Proaulacopleura; =Clevelandella; =Labiostria)
• Apheloides
• Aphelotoxon (=Ponumia)
• Apianurus
• Apiflabellum
• Aplexura
• Apocalymene
  Apocalymene
  Apocalymene is a genus of trilobite in the order Phacopida, which existed in what is now Australia. It was described by Chatterton & Campbell in 1980, and the type species is Apocalymene coppinsensis.-External links:* at the Paleobiology Database...
  
  
• Apollonaspis
• Apomodocia
  Apomodocia
  Apomodocia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Apoplanias
• Appendicysta
• Aprathia

Ar

• Araeocephalus
• Aragotus
• Araiocaris
• Araiopleura
• Arapahoia (=Hesperaspis)
• Arator
• Arcadiaspis
• Archaeagnostus
  Archaeagnostus
  Archaeagnostus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Archaeaspis
  Archaeaspis
  Archaeaspis is an extinct genus of Redlichiid trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period. The first specimens were first found in Siberia, where they were originally thought to have been...
  
  
• Archaeocoryphe
• Archaeopleura
• Archaeuloma
• Archegonus (=Cylindraspis)
• Archikainella
• Arcifimbria
• Arcticalymene
  Arcticalymene
  Arcticalymene is a genus of trilobites. It includes species named after each of the Sex Pistols: A. cooki , A. jonesi , A. matlocki , A. rotteni and A. viciousi , all named by Adrian and Edgecombe in 1997....
  
  
• Arcticeraurinella
• Arctinurus
  Arctinurus
  Arctinurus boltoni was a lichid trilobite of the mid-Silurian. This trilobite reached about eight inches in length, though the normal adult carapace was about four inches. It lived in moderately deep-water in semi-tropical regions. Arctinurus fossils have been found in Europe and North America...
  
   (=Oncholichas; =Platynotus; =Pterolichas)
• Arctipeltis
• Arcuolenellus
• Arcuolimbus
  Arcuolimbus
  Arcuolimbus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Arduennella
  Arduennella
  Arduennella is a genus of trilobite in the order Phacopida, which existed in what is now Belgium. It was described by Wenndorf in 1990, and the type species is Arduennella maillieuxi, which was originally described as Homalonotus maillieuxi by Asselberghs in 1923.-External links:* at the...
  
  
• Arduennops
• Areia
  Areia (trilobite)
  Areia is a genus of trilobite in the order Phacopida, which existed in what is now the Czech Republic. It was described by Barrande in 1872, and the type species is Areia bohemica.-External links:* at the Paleobiology Database...
  
  
• Areiaspis
• Arellanella
• Argasalina
• Argentopyge
  Argentopyge
  Argentopyge is a genus of trilobite in the order Phacopida, which existed in what is now Argentina. It was described by Baldis in 1972, and the type species is Argentopyge argentina.-External links:* at the Paleobiology Database...
  
  
• Arglina
• Argunaspis
  Argunaspis
  Argunaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Ariaspis
• Armagnostus
  Armagnostus
  Armagnostus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Armorigreenops
• Arraphus
• Arrhenaspis
• Arthricocephalus
  Arthricocephalus
  Arthricocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
   (=Arthricocephalites; =Protoryctocara; =Oryctocarella)
• Arthrorhachis (=Metagnostus; =Girvanagnostus)
• Artokephalus

As

• Asaphellina
• Asaphellus (=Asaphelloides; =Asaphoon; =Hemigyraspis; =Megalaspidella; =Plesiomegalaspis)
• Asaphiscus
  Asaphiscus
  Asaphiscus is a genus of trilobite that lived in the Cambrian. Its remains have been found in Australia and North America, especially in Utah.-External links:* in the Paleobiology Database...
  
  
• Asaphopsis
• Asaphopsoides (=Dainellicauda; =Xiangxiia)
• Asaphus
  Asaphus
  Asaphus is a genus of Ordovician trilobites....
  
   (=Schizophorus)
• Ascetopeltis
• Ascionepea
• Asiagena
• Asiatella
  Asiatella
  Asiatella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Asilluchus
• Asiocephalus
• Asperocare
• Aspidaeglina
  Aspidaeglina
  Aspidaeglina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Aspidagnostus (=Biragnostus)
• Aspidochuangia
• Asteropyge
  Asteropyge
  Asteropyge is an extinct genus of trilobite. It contains one species, A. perforata.-External links:* at the Paleobiology Database...
  
  
• Asthenaspis
• Asthenopsis
  Asthenopsis
  Asthenopsis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Astroproetus (=Clypoproetus; =Enodiproetus; =Sibiroproetus)
• Asturiaspis
• Astycoryphe

At

• Atdabanella
  Atdabanella
  Atdabanella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Athabaskia
• Athabaskiella
• Atopasaphus
• Atopiaspis
• Atopina
• Atopophacops
• Atops
  Atops
  Atops is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
   (=Ivshiniellus)
• Atractocybeloides
• Atractopyge
  Atractopyge
  Atractopyge is a genus of trilobite that lived in what would be Asia and Europe from the middle Ordovician to the early Devonian from 472—412.3 mya, existing for approximately .It contains two species, A. aspera, and A. dentata.-Taxonomy:...
  
   (=Cybelella)
• Atratebia
• Atypicus

Au

• Aulacodigma
  Aulacodigma
  Aulacodigma is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501-490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Aulacoparia
• Aulacoparina
• Aulacopleura
  Aulacopleura
  Aulacopleura, also known as Arethusa, Arethusina, and Paraaulacopleura, is a genus of trilobite that lived during the Silurian. The cephalon is semicircular or semielliptical, with border and preglabellar field...
  
   (=Arethusa; =Arethusina; =Paraaulacopleura)
• Aulacopleurina
• Aulacopleuroides
• Auricula
• Auritama
  Auritama
  Auritama is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Austinvillia
• Australaspis
• Australoacaste
• Australokaskia
• Australomyttonia
• Australops
  Australops
  Australops is a genus of trilobite in the order Phacopida, which existed in what is now Argentina. It was described by Baldis in 1972, and the type species is Australops australis.-External links:* at the Paleobiology Database...
  
  
• Australopyge
  Australopyge
  Australopyge is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Australoscutellum
• Australosutura
• Autoloxolichas

Av

• Avalanchurus
  Avalanchurus
  Avalanchurus is an extinct genus of trilobite. It contains three species: A. garfunkeli; A. lennoni; and A. simoni.-External links:* at the Paleobiology Database...
  
  
• Avalonia
  Avalonia
  Avalonia was a microcontinent in the Paleozoic era. Crustal fragments of this former microcontinent underlie south-west Great Britain, and the eastern coast of North America. It is the source of many of the older rocks of Western Europe, Atlantic Canada, and parts of the coastal United States...
  
  
• Avascutellum (=Ctenoscutellum; =Rutoscutellum)
• Avonina
  Avonina
  Avonina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  

B

:

:

Ba

• Babinops
• Badainjaranaspis
• Badulesia
• Bagongshania
• Bagradia
• Baikadamaspis
• Baikonuraspis
• Bailiaspis
• Bailiella (=Liaotungia; =Liocephalus; =Tangshihella)
• Bailielloides
• Bainella
  Bainella
  Bainella is an extinct genus of trilobite. It contains three species: B. africana; B. baini; and B. cristagalli.-External links:* at the Paleobiology Database...
  
   (=Paradalmanites; =Paranacaste)
• Bajanaspis
• Bajangoliaspis
• Balangcunaspis
• Balangia
• Balcoracania
  Balcoracania
  Balcoracania is a genus of trilobite of the family Emuellidae. Their fossils are found chiefly in Australia....
  
  
• Balderia
  Balderia
  Balderia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Balizoma
  Balizoma
  Balizoma is a genus of trilobite from the family Encrinuridae. It has only been found in rocks of Silurian age. Its type species, B. variolaris, was named by Alexandre Brongiart in 1822, and is found in Dudley, England,.-Sources:...
  
  
• Balnibarbi
  Balnibarbi
  Balnibarbi is an extinct genus olenid ptychopariid trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago...
  
  
• Baltagnostus (?=Trilagnostus)
• Baltiites
• Baltobergstroemia
• Baltoparadoxides
• Bancroftolithus
• Bandalaspis
• Baniaspis
• Banilatites
• Banqiaoites
• Baoshanaspis
• Bapingaspis
• Barklyella
• Barrandeopeltis
• Barrandia
• Basanellus
• Bashania
• Basidechenella
• Basilicus (=Basiliella; =Carinobasiliella; =Dolerobasilicus; =Basilicoides; =Mekynophrys; =Parabasilicus)
• Basocephalus
• Batenoides
• Bathycheilus (=Parabathycheilus)
• Bathydiscus
  Bathydiscus
  Bathydiscus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Bathyholcus
• Bathynotellus
• Bathynotus (=Pagura)
• Bathyocos
• Bathyurellus
• Bathyuriscellus
  Bathyuriscellus
  Bathyuriscellus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Bathyuriscidella
• Bathyuriscopsis
  Bathyuriscopsis
  Bathyuriscopsis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Bathyuriscus
  Bathyuriscus
  Bathyuriscus is an extinct genus of Cambrian trilobite. It was a nektobenthic predatory carnivore. Specimens have been found in the Marjumian of the USA and in the Middle Cambrian of Australia, Canada , Greenland, Mexico, and the USA...
  
   (=Orria; =Orriella; =Wenkchemnia)
• Bathyurus
• Batocara
  Batocara
  Batocara is a genus of trilobite in the family Encrinuridae. It was described by D.L. Strusz in 1980. The type species is Batocara bowningi, which was originally described as Encrinurus bowningi by Foerste in 1888. It also contains the species Batocara borenorense and Batocara fritillum.-External...
  
   (=Australurus)
• Bavarilla
  Bavarilla
  Bavarilla is an extinct genus of trilobite.-External links:* at the Paleobiology Database...
  
  
• Bayfieldia

Be

• Bedicella
• Beggaspis
• Beigongia
• Beikuangaspis
• Beishanella
• Beldirella
• Beleckella
• Belenops
• Belgibole
• Bellacartwrightia
  Bellacartwrightia
  Bellacartwrightia is a relatively uncommon genus of Phacopid trilobite, found in the mid-Devonian Hamilton Group of New York state, mainly in strata exposed near Lake Erie just west of Buffalo. This trilobite is usually about 1.5" to 2" long...
  
  
• Bellaspidella
• Bellaspis
• Bellefontia
• Belliceps
  Belliceps
  Belliceps is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Belovia
• Benedettia
• Benesovella
• Benthamaspis
  Benthamaspis
  Benthamaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
   (=Oculomagnus)
• Benxiella
• Beothuckia
• Bergamia (=Bohemaspis; =Brandysops; =Cochliorrhoe)
• Bergeroniaspis
• Bergeroniellus
• Bergeronites (=Spinopanura)
• Berkeia
• Berkutaspis
• Bessazoon
• Bestjubella
• Bettonolithus
  Bettonolithus
  Bettonolithus is a Trilobite of the Order Asaphida. It is in the family Trinucleidae.Fossil specimens have been found in the Lower Ordovician rocks of Gilwern Hill in Powys, Wales....
  
  
• Bevanopsis
  Bevanopsis
  Bevanopsis is a genus of trilobite in the order Phacopida, which existed in what is now Virginia, U.S.A. It was described by Cooper in 1953, and the type species is Bevanopsis ulrichi.-External links:* at the Paleobiology Database...
  
  

Bi

• Biaverta
• Bicella
• Biceratops
• Biciragnostus
  Biciragnostus
  Biciragnostus is a genus of trilobite in the order Agnostida, which existed in what is now Kazakhstan. It was described by F. Ergaliev in 2001, and the type species is Biciragnostus biformis....
  
  
• Bidjinella
  Bidjinella
  Bidjinella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Bienella
  Bienella
  Bienella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Bienvillia (=Diatemnus; =Mendoparabolina)
• Bifodina
• Bigotina
• Bigotinella
  Bigotinella
  Bigotinella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Bigotinops
• Bigranulella
• Bijaspis
• Bijelina
• Bilacunaspis
• Bilimbataia
• Billevittia
• Billingsaspis
• Binella
• Binervus
• Binodaspis (=Xilingxia)
• Birmanitella
• Birmanites (=Opsimasaphus)
• Bitumulina

Bl

• Blackwelderia (=Parablackwelderia)
• Blackwelderioides
  Blackwelderioides
  Blackwelderioides is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Blainia
• Blainiopsis
• Blairella
• Blandiaspis
• Blandicephalus
• Blanodalmanites
  Blanodalmanites
  Blanodalmanites is a genus of trilobite in the order Phacopida, which existed in what is now Malaysia. It was described by Kobayashi and Hamada in 1972, and the type species is Blanodalmanites nubelania.-External links:...
  
  
• Blayacina
• Blodgettia
• Blosyropsis
• Blountia (=Homodictya; =Protillaenus; =Stenocombus)
• Blountiella
  Blountiella
  Blountiella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Blountina
• Blystagnostus

Bo

• Boeckaspis (=Boeckia; =Sphaerophthalmella)
• Boeckops
  Boeckops
  Boeckops is a genus of trilobite in the order Phacopida, which existed in what is now the Czech Republic. It was described by Chlupac in 1972, and the type species is Boeckops boecki, which was originally described as Phacops boecki by Hawle and Corda in 1847.-External links:* at the Paleobiology...
  
  
• Boedaspis
• Boestrupia
• Bohemilla
• Bohemiproetus
• Bohemoharpes (=Declivoharpes; =Unguloharpes)
• Bohemopyge
• Bojocoryphe
• Bojoscutellum (=Holomeris)
• Bolaspidaspis
• Bolaspidella (=Deissella; =Howellaspis)
• Bolaspidellus
• Bolaspidina
• Bolaspis
• Bolbocephalus
  Bolbocephalus
  Bolbocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Bolbochasmops
  Bolbochasmops
  Bolbochasmops is a genus of trilobite in the order Phacopida, which existed in what is now Estonia. It was described by McNamara in 1980, and the type species is Bolbochasmops emarginata, which was originally described as Chasmops bucculenta, and later as Phacops bucculenta by Schmidt in...
  
  
• Bolbolenellus
• Bolboparia
  Bolboparia
  Bolboparia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Bolivicrania
• Boliviproetus
• Bollandia
• Bondarevites
• Bondonella
  Bondonella
  Bondonella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Bonnaria
• Bonnaspidella
• Bonnaspis
• Bonneterrina
  Bonneterrina
  Bonneterrina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
   (=Holstonia; =Piedmontia)
• Bonnia
• Bonniella
• Bonnima
• Bonnioides
• Bonniopsis
• Borealarges
• Borealaspis
  Borealaspis
  Borealaspis is an extinct genus of Trilobite. It contains two species, B. biformis, and B. whittakerensis.-External links:* at the Paleobiology Database...
  
   (=Alreboaspis)
• Borealia
• Boreoscutellum
• Borkopleura
• Bornemannaspis
  Bornemannaspis
  Bornemannaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Bornholmaspis
• Borogothus
  Borogothus
  Borogothus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Borovikovia
• Borthaspidella
• Boschchekulia
• Botomella
  Botomella
  Botomella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
   (=Sayanella)
• Botrioides
• Bouleia (=Dereimsia)
• Bowmania

Br

• Brabbia
• Brachyaspidion (=Brachyaspis)
• Brachyaspis
• Brachyhipposiderus
• Brachymetopella
• Brachymetopus (=Brachymetopina; =Iriania)
• Brackebuschia (=Bodenbenderia; =Hexianella)
• Bradocryphaeus
• Bradyfallotaspis
  Bradyfallotaspis
  Bradyfallotaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Braintreella
• Branisaspis
• Braunops
• Breizhops
  Breizhops
  Breizhops is a genus of trilobite in the order Phacopida, which existed in what is now Brittany, France. It was described by Morzadec in 1983, and the type species is Breizhops lanceolatus.-External links:* at the Paleobiology Database...
  
  
• Brevibole
• Breviphillipsia
• Breviredlichia
• Breviscutellum
• Brevitermierella (=Paratermierella)
• Brianurus (=Briania)
• Bridgeia
  Bridgeia
  Bridgeia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Briscoia
• Bristolia
• Broeggerolithus (=Ulricholithus)
• Bromella
• Brongniartella
  Brongniartella
  Brongniartella is a genus of red alga, named after French naturalist Adolphe Brongniart.-References:*Schmitz, C.J.F. . "Die Gattung Lophothalia J.Ag" Ber. Dtsch. Bot. Ges. 11:212–32.- External links :*...
  
   (=Pamirotellus; =Portaginus)
• Bronteopsis (=Homoglossa)
• Brontocephalina
• Brontocephalus
• Brunswickia
• Brutaspis
• Brutonaspis
• Brutonia

Bu

• Bubupeltina
• Buchiproetus
• Buenaspis
• Buenellus
  Buenellus
  Buenellus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Bufoceraurus
  Bufoceraurus
  Bufoceraurus is an extinct genus of Cheirurid trilobite found in the Ordovician Trenton Group limestones of central Ontario, Canada.-External links:* at the Paleobiology Database...
  
  
• Buitella
• Bulaiaspis
• Bulbaspis
• Bulbolenus
• Bulkuraspis
• Bumastella
• Bumastides
  Bumastides
  Bumastides is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Bumastoides
• Bumastus
  Bumastus
  Bumastus is an extinct genus of trilobites which existed from the Early Ordovician period to the Late Silurian period. They were relatively large trilobites, reaching a length of . They were distinctive for their highly globular, smooth-surfaced exoskeleton...
  
  
• Burgesina
• Burlingia
• Burmeisterella
• Burmeisteria
• Burminresia
• Burnetiella (=Burnetia)
• Burtonops
• Buttsia
• Buttsiella
• Butyrinia

C

:

:

Ca

• Caborcella
• Caganaspis
• Cainatops (=Cornucoryphe)
• Calipernurus
• Callaspis
• Callavia (=Cephalacanthus; =Callavalonia; =Cobboldus)
• Callidaspina
• Callidaspis
• Calliops
• Calmonia
  Calmonia
  Calmonia is an extinct genus of trilobite. It contains one species: C. curvioculata.-External links:* at the Paleobiology Database...
  
  
• Calocephalites
• Calodiscus (=Goniodiscus; =Brevidiscus)
• Calvinella
• Calvipelta
• Calybole
• Calycinoidia
• Calycoscutellum
• Calymene
  Calymene
  Calymene is a genus of trilobites in the order Phacopida that were found throughout North America, North Africa, and Europe in primarily Silurian outcrops. Calymene are easily confused with Gravicalymene and Flexicalymene, also part of the Calymenidae family...
  
   (=Calymena; =Calymaena; =Calymmene; =Calymmena)
• Calymenella
• Calymenesun
• Calymenia
• Calymenidius
  Calymenidius
  Calymenidius is an extinct genus of trilobite.-External links:* at the Paleobiology Database...
  
  
• Calyptaulax (=Ligometopus; =Homalops)
• Camaraspis
• Camaraspoides
• Cambroinyoella
• Cambropallas
• Cambrophatictor
• Cambrunicornia
• Camsellia
• Cancapolia
• Canningella
• Canotaspis
• Canotiana (=Williamsina)
• Capricornia
• Caputrotundum
• Carbonocoryphe
• Carbonoproetus
• Carinamala
  Carinamala
  Carinamala is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Carinocranium
• Carinopyge
• Carlopsia
• Carmon
• Carniphillipsia
• Carolinites (=Dimastocephalus; =Keidelia; =Tafnaspis)
• Catadoxides
• Cataplotaspis
• Catasolenopleura
• Cathayanella
• Catillicephala (=Cephalocoelia)
• Catillicephalites
• Catinouyia
• Catochia
• Catuniella
  Catuniella
  Catuniella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Caulaspina
• Caulaspis
• Cavetia
• Cavia
• Cayastaia
• Cayupania
• Caznaia

Ce

• Cedaraspis
• Cedaria
• Cedarina
• Cekovia
• Celmus
  Celmus
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 471 to 478 million years ago....
  
   (=Crotalurus; =Ischyrophyma)
• Celtencrinurus
• Centauropyge
• Centonella
• Centriproetus
• Centropleura
• Cephalopyge
• Cerampyx
• Ceratarges
  Ceratarges
  Ceratarges was a genus of Lichidan Trilobite from the Middle to Late Devonian. It lived in what is now Jbel Issoumour in Morocco as a detritivore....
  
   (=Arges)
• Ceratevenkaspis
• Ceratocara
• Ceratocephala (=Bounyongia; =Onchaspis)
• Ceratocephalina
• Ceratolichas
• Ceratonurus
• Ceratopeltis
  Ceratopeltis
  Ceratopeltis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Ceratoproetus
• Ceratopyge
• Ceraurinella (=Bartoninus)
• Ceraurinium
• Ceraurinus
  Ceraurinus
  Ceraurinus is an extinct genus of trilobite in the order Phacopida. It contains one species, C. serratus.-External links:* at the Paleobiology Database...
  
   (=Remipyga)
• Cerauromeros
• Cerauropeltis
• Ceraurus
  Ceraurus
  Ceraurus is a genus of cheirurid trilobite of the middle and, much more rarely, the upper Ordovician. They are commonly found in strata of the lower Great Lakes region...
  
   (=Eoceraurus)
• Cermataspis
• Cermatops
• Cernuolimbus
• Ceronocare

Ch

• Chacomurus
• Chakasskia
• Chakasskiella
• Chalchaquiana
• Chalfontia
• Chambersiellus
• Champlainia
  Champlainia
  Champlainia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Chancia
  Chancia (trilobite)
  For the commune in France, see Chancia.Chancia is an extinct genus of Cambrian trilobite. It was a "fast-moving epifaunal detritivore" from Canada and the USA . Chancia was a particle feeder...
  
  
• Chanciaopsis
• Changchowilla
• Changia (=Coreanocephalus; =Fengshania)
• Changqingia (=Austrosinia)
• Changshania (=Metachangshania; =Prochangshania)
• Changshanocephalus
• Changyangia
• Chaoaspis
  Chaoaspis
  Chaoaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Charabaia
• Charaulaspis
• Charchaqia (=Aplotaspis)
• Chariocephalus
• Chashania
• Chasmops
• Chatiania (=Parachatiania)
• Chatkalagnostus (=Oculagnostus)
• Chattiaspis
• Chauffouraspis
• Chaunoproetoides
• Chaunoproetus (=Carnicia)
• Cheilocephalus (=Pseudolisania; =Zhalangtania)
• Cheiropyge (=Suturikephalion)
• Cheiruroides (=Inikanella)
• Cheirurus
  Cheirurus
  Cheirurus is a genus of trilobite that lived from the Late Cambrian to the Middle Devonian. Its remains have been found in Africa, Asia, Australia, Europe, and North America.-External links:** in the Paleobiology Database...
  
  
• Chekiangaspis
• Chelediscus
  Chelediscus
  Chelediscus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Chelidonocephalus
• Chencunia
• Chengjiangaspis
• Chengkouaspis
• Chengkouella
• Chengshanaspis
• Chiarumanipyge
• Chiawangella
• Chichikaspis
• Chiides
• Chilometopus
• Chilonorria
• Chimaerastella
• Chinghisicus
• Chiops
• Chiozoon
• Chishanheella
• Chittidilla (=Diandongaspidella; =Diandongaspis)
• Chlupacula
• Chlustinia
• Cholopilus
• Chomatopyge
• Chondagraulos
• Chondragraulina
• Chondranomocare
• Chondrinouyina
• Chondroparia
  Chondroparia
  Chondroparia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Chorbusulina
• Chosenia (=Leiostegioides)
• Chotecops
  Chotecops
  Chotecops is a genus of trilobites from the order Phacopida, suborder Phacopina, family Phacopidae. This genus is from the Devonian and can be found in Germany usually in pyrite. They are often mistaken as Phacops. It is not uncommon to find this genus preserved with limbs...
  
   (=Cordapeltis)
• Choubertella
• Chuangia (=Schantungia; =Parachuangia; =Pterochuangia)
• Chuangiella
• Chuangina
• Chuangioides
• Chuangiopsis
• Chuangites
• Chuanqianoproetus
• Chugaevia
• Chulanolenus
• Chunghwaella
• Churkinia

Ci

• Cilia
• Ciliocephalus
• Ciliscutellum
• Cinnella
• Circulocrania
  Circulocrania
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Cirquella
  Cirquella
  Cirquella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  

Cl

• Clarella
• Clariondia
  Clariondia
  Clariondia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Clarkeaspis
• Clavagnostus (=Tomorhachis; =Culipagnostus; =Stigmagnostus; =Acanthagnostus; =Leptagnostus; =Paraclavagnostus)
• Clavaspidella
• Clavatellus
• Clavibole
• Clavigellus
• Clelandia (=Harrisia; =Bynumiella)
• Clemenella
• Cliffia
• Cloacaspis
  Cloacaspis
  Cloacaspis is an extinct genus of Olenid Ptychopariid trilobite. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago...
  
  

Co

• Cobboldites
  Cobboldites
  Cobboldites is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Coenaspis
• Coenaspoides
• Coephalocoeliaspis
• Coignops
• Colliceps
• Collis
• Colobinion
• Colossaspis
• Colpocoryphe
  Colpocoryphe
  Colpocoryphe is a genus of trilobites in the family Calymenidae.-Morphology:* Convex Cephalon* Trapezoidal glabellea, frequently distinctly furrowed and surelevated compared to the axis....
  
   (=Thoralocoryphe)
• Coltraneia
• Columbicephalus
• Comanchia
• Combewoodia
• Comluella
• Compsocephalus (=Lepidocephaloides)
• Comptonaspis
• Comura
• Conagraulos
• Conaspis
• Condylopyge (=Paragnostus; =Fallagnostus)
• Conicephalus
• Conimetopus
• Coniproetus
• Connagnostus
  Connagnostus
  Connagnostus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Conococheaguea
• Conocoryphe (=Conocephalites; =Conocephalus; =Couloumania)
• Conoides
  Conoides
  Conoides is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Conokephalina (=Lobocephalina; =Ruzickaia; =Lobocephalus)
• Conolichas (=Cypholichas)
• Conomicmacca
• Conophillipsia
• Conophrys
• Conopolus
  Conopolus
  Conopolus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Conoredlichia
• Constantina
  Constantina
  Constantina , and later known as Saint Constance, was the eldest daughter of Roman Emperor Constantine the Great and his second wife Fausta, daughter of Emperor Maximian...
  
  
• Constrictella
• Contracheirurus
• Coosella
  Coosella
  Coosella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
   (=Wilsonella)
• Coosia
  Coosia
  Coosia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Coosina
  Coosina
  Coosina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Coosinoides
• Coplacoparia
• Corbinia
• Corcorania
• Cordania
  Cordania
  Cordania is an extinct genus of trilobite that lived during the lower and Middle Devonian.- Sources :**...
  
  
• Coreolenus
• Cornuproetus
• Cornuscutellum
• Coronaspis
• Coronocephalus (=Coronocephalina; =Senticucullus)
• Coronura
• Corrugatagnostus (=Segmentagnostus; =Granulatagnostus; =Cenagnostus)
• Corycephalus
• Corynexochella
• Corynexochides
• Corynexochina
  Corynexochina
  The Corynexochina are a poorly understood subdivison of the Corynexochida order of trilobites....
  
  
• Corynexochus (=Karlia)
• Costapyge
• Costonia
• Cotalagnostus
• Courtessolium

Cr

• Craigheadia
• Craspedarges
• Craspedops
• Crassibole
• Crassifimbra
• Crassiproetus
• Crepicephalina
  Crepicephalina
  Crepicephalina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
   (=Mesocrepicephalus)
• Crepicephalus
  Crepicephalus
  Crepicephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Crepichilella
• Criotypus
• Crithias =Endogramma; =Enneacnemis; =Goniacanthus; =Micropyge; =Monadina; =Monadella; =Selenosema; =Staurogmus; =Tetracnemis)
• Croixana
• Cromus (=Encrinuraspis)
• Crossoura
• Crotalocephalides
• Crotalocephalina
  Crotalocephalina
  Crotalocephalina is an extinct genus of trilobite in the order Phacopida found in Morocco.-External links:** at the Paleobiology Database...
  
   (=Gibbocephalus; =Mezocrotalus)
• Crotalocephalus
  Crotalocephalus
  Crotalocephalus is a genus of trilobite that lived from the Late Silurian to the Early Devonian. Its remains have been found in Asia, Australia, Africa, and Europe.-External links:* in the Paleobiology Database...
  
   (=Cerauroides; =Pilletopeltis; =Boeckia)
• Crozonaspis
• Crucicephalus
• Crusoia
• Crusoiina
• Cryphaeoides
• Cryphina
• Cryphops (=Gortania; =Microphthalmus)
• Cryptoderaspis
• Cryptolithoides
• Cryptolithus

Cu

• Cuchulain
• Culmenaspis
• Cultrops
• Cummingella
• Curiaspis
• Curriella
• Curuyella
• Curvoryctocephalus
• Cuyanaspis

Cy

• Cyamella
  Cyamella
  The cyamella is a small sesamoid bone embedded in the tendon of the popliteus muscle. It is a variant of normal anatomy. It is rarely seen in humans, but has been described more often in other primates and certain other animals....
  
   (=Cyamops; =Paracyamella)
• Cybantyx
• Cybele (genus) (=Cybelina)
• Cybeloides
• Cybelopsis
• Cybelurus (=Miracybele)
• Cyclognathina
• Cyclolorenzella
• Cyclopyge
  Cyclopyge
  Cyclopyge is a genus of skippers in the family Hesperiidae.-References:*...
  
   (=Egle; =Aeglina)
• Cyphambon
• Cyphaspides
• Cyphaspis
  Cyphaspis
  Cyphaspis is a genus of trilobite that lived from the Late Ordovician to the Late Devonian. Its remains have been found in Europe and North America.- Sources :* * Richard Fortey, Trilobite: Eyewitness to Evolution-External links:...
  
   (=Novakaspis)
• Cyphinioides
• Cyphoniscus
• Cyphoproetus
• Cyrtodechenella
• Cyrtometopella
• Cyrtometopus
  Cyrtometopus
  Cyrtometopus is an extinct genus of trilobite in the order Phacopida. It contains one species, C. meridianus.-External links:* at the Paleobiology Database...
  
  
• Cyrtoproetus
• Cyrtoprora
  Cyrtoprora
  Cyrtoprora is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Cyrtosymbole
• Cyrtosymboloides
• Cystispina

D

:

Da

• Dactylocephalus
• Daguinaspis (=Eodaguinaspis; =Epidaguinaspis)
• Daihuaia
• Dalarnepeltis
• Dalaspis
• Daldynaspis
• Daldynia
• Dalejeproetus
• Dalmanites
  Dalmanites
  Dalmanites is a genus of trilobite in the order Phacopida.The trilobites of this genus have slightly convex exoskeletons with an average diameter of 4–7 cm . The cephalon is semicircular or parabolic. The glabella is often pear-shaped, and tapers outward toward the front...
  
   (=Dalmania; =Guaranites; =Hausmannia; =Heliocephalus; =Makaspis; =Ommokris)
• Dalmanitina
• Dalmanitoides
• Dalmaniturus
• Damesella (=Haibowania; =Eodamesella)
• Damesops (=Meringaspis; =Paradamesops)
• Damiaoaspis
• Dananzhuangaspis
• Dananzhuangia
• Danarcus
• Danjiangella
• Danzhaiaspis
• Danzhaisaukia
• Daopingia
• Dartonaspis
• Dasometopus
• Datongites
• Datsonia
• Dawsonia (=Aculeodiscus; =Metadiscus)
• Dayinaspis
• Dayongia
• Daytonia
• Dazhuia

De

• Deacybele
• Deanaspis
• Deanokephalus
• Dechenella (=Eudechenella)
• Dechenelloides
• Dechenellurus
• Deckera
• Declivolithus
• Decordinaspis
• Decoroproetus (=Ogmocnemis; =Proetidella)
• Decoroscutellum
• Decus
  Decus
  Decus is a Latin word meaning "ornament". It may refer to* Decus et tutamen, "an ornament and a safeguard", motto on the one-pound sterling coin* DECUS, the Digital Equipment Computer Users' Society...
  
  
• Degamella
• Deinoproetus
• Deiphon
  Deiphon
  Deiphon was a distinctive genus of Silurian phacopid trilobites of the family Cheiruridae found in Western and Central Europe, and in Central and Eastern United States. The type species, D...
  
  
• Deiracephalus
  Deiracephalus
  Deiracephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
   (=Asteraspis)
• Deiradonyx
• Dekalymene
• Delagnostus
• Delamarina (=Delamarella)
• Delaria
• Delgadella (=Alemtejoia; =Delgadodiscus; =Delgadoia; =Pagetiellus; =Pentagonalia)
• Delgadoa
• Delinghaspis
• Dellea (=Eshelmania)
• Delleana
• Delocare
• Deloites
• Deloops
• Delops
• Deltacare
• Deltacephalaspis
  Deltacephalaspis
  Deltacephalaspis is an extinct genus of trilobite in the order Phacopida. It contains four species, D. comis, D. magister, D. retrospina, and D. tumida.-External links:* at the Paleobiology Database...
  
  
• Deltadechenella
• Deltina
• Deltocephalus
• Deltophthalmus
• Demeterops
• Denagnostus
• Denaspis
• Denckmannites (=Denckmannia)
• Denella
• Denemarkia
• Densocephalus
• Dentaloscutellum
• Derikaspis
• Desmetia
• Desmus
• Despujolsia
• Destombesina
• Destombesites

Di

• Diabole
• Diacalymene
  Diacalymene
  Diacalymene is a genus of trilobite from the order Phacopida, suborder Calymenina. It includes the species D. ouzregui, D. clavicula, D. diademata and D. gabrielsi. It lived in the Ordovician and Silurian periods....
  
  
• Diacanthaspis
• Diacoryphe
• Diademaproetus
• Dianops
• Diaoyaspis
• Diaphanometopus
  Diaphanometopus
  Diaphanometopus is an extinct genus of trilobite in the order Phacopida.-External links:* at the Paleobiology Database...
  
  
• Dicanthopyge
• Diceratocephalina
• Diceratocephalus
  Diceratocephalus
  Diceratocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Diceratopyge (=Paraceratopyge)
• Dicerodiscus
  Dicerodiscus
  Dicerodiscus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Dichelepyge (=Bicornipyge)
• Dicranogmus
• Dicranopeltis (=Dicranopeltoides; =Nonix; =Raymondarges; =Trachylichas; =Tsunyilichas)
• Dicranurus
  Dicranurus
  Dicranurus was a genus of Lower Devonian lichid trilobites that lived in a shallow sea that lay between Euramerica and Gondwanaland, corresponding to modern-day Oklahoma and Morocco, respectively. As such, their fossils are found in Oklahoma and Morocco.Their bodies averaged about or so, in...
  
  
• Dictya
• Dictyella
• Dictyocephalites
• Didrepanon
• Didwudina
• Diemanosaukia
• Dienstina
• Dignaceps
• Dignagnostus
• Digonus
• Digrypos
• Dikella
• Dikelocephalioides
• Dikelocephalites
• Dikelocephalopsis
• Dikelocephalus
  Dikelocephalus
  Dikelocephalus is a genus of trilobite that was from the Sunwaptan . Their fossils are commonly found as disarticulated sclerites in the upper Mississippi Valley of North America. Sclerite size ranges from a few millimeters to almost 15 centimeters or so. The total animal approached long....
  
  
• Dikelokephalina
• Dikelus
• Dilatalimbus
• Dilataspis
• Dimeropyge (=Haploconus)
• Dimeropygiella
  Dimeropygiella
  Dimeropygiella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Dindymene
  Dindymene
  Dindymene is an extinct genus of trilobite in the order Phacopida. It contains two species, D. didymograpti, and D. hughesiae.-External links:* at the Paleobiology Database...
  
   (=Cornovica)
• Dinesus
• Dingxiangaspis
• Dionide (=Dione; =Dionidepyga; =Trigrypos)
• Dionideina
• Dionidella
• Dipentaspis
  Dipentaspis
  Dipentaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Dipharangus
• Dipharus
• Diplagnostus (=Enetagnostus; =Tasagnostus)
• Diplapatokephalus
• Dipleura
• Dipleuropyge
• Diplorrhina (=Mesospheniscus; =Quadragnostus; =Pseudoperonopsis)
• Diplozyga
• Dipyrgotes
  Dipyrgotes
  Dipyrgotes is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Discagnostus
• Dislobosaspis
• Distagnostus
  Distagnostus
  Distagnostus is a genus of trilobite in the order Agnostida, which existed in what is now Queensland, Australia. It was described by Shergold in 1972, and the type species is Distagnostus ergodes....
  
  
• Distazeris
• Distyrax
• Ditomopyge (=Cyphinium; =Permoproetus; =Neophillipsia)
• Dividuagnostus (=Pezizopsis)
• Dixiphopyge

Do

• Dokimocephalus
• Dolerolenus
• Dolerolichia
• Dolgaiella
• Dolgeuloma
• Dolichagnostus
• Dolichoharpes
• Dolicholeptus
• Dolichometopsis
• Dolichometopus
• Donggouia
• Doremataspis
• Doryagnostus (=Ceratagnostus; =Rhodotypiscus)
• Dorypygaspis
• Dorypyge
• Dorypygina
• Dorypygoides
• Doublatia
• Douposiella (=Tongshania)

Dr

• Drabia
• Drepanopyge
  Drepanopyge
  Drepanopyge is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Drepanura
• Drepanuroides
  Drepanuroides
  Drepanuroides is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
   (=Xishuiella)
• Dresbachia
  Dresbachia
  Dresbachia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Drevermannia
• Dreyfussina (=Prephacopidella)
• Drotops
  Drotops
  Drotops is a genus of trilobites from the order Phacopida, family Phacopidae. This genus is from the Devonian period and can be found in Morocco. Drotops is large in comparison to most other trilobite genera, lengths of eight inches are common. Drotops can be distinguished from other genera in...
  
  
• Drozdoviella
• Drumaspis

Du

• Duamsannella
• Dubhglasina (=Australoharpes; =Sinoharpes)
• Dubovikites
• Ductina
  Ductina
  Ductina is a genus of trilobites of the order Phacopida, family Phacopidae, from the Lower Devonian. These are usually small trilobites, rarely exceeding half an inch. They come from the Devonian time period and are found in Germany and China...
  
  
• Dudleyaspis
• Dudu
• Duftonia
• Duibianaspis
• Dulanaspis
• Dunderbergia
• Dunderburgella
• Dunopyge
• Duodingia
• Duplora
• Durinia
  Durinia
  Durinia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Dushania
• Duyunaspis
• Duyunia

E

:

:

Ec

• Eccoptochile
  Eccoptochile
  Eccoptochile is an extinct genus of trilobite in the order Phacopida. It contains one species, E. clavigera.-External links:* at the Paleobiology Database...
  
  
• Eccoptochiloides
• Echidnops
• Echinolichas
• Echinophacops
• Echinopyge
• Ectenaspis
• Ectenonotus
• Ectillaenus (=Wossekia)

Ef

• Effnaspis
• Effops
• Egyngolia (=Mongolodiscus)
• Ehmania
• Ehmaniella
  Ehmaniella
  Ehmaniella is a genus of trilobite known from the Middle Cambrian Burgess Shale. Its major characteristics are a wide cranidium, heavy eye ridges, longitudinal striae on the pre-glabellar area, and a small pygidium with few segments....
  
   (=Anomalocephalus; =Clappaspis)

El

• Elandaspis
• Elankaspis
• Elaphraella
• Elasmaspis
• Elatilimbus
• Elburgia
• Eldoradia
• Eldredgeia
  Eldredgeia
  Eldredgeia is a genus of trilobites in the order Phacopida, suborder Phacopina, family Calmoniidae. This genus comes from the Devonian of South America, usually found in nodules. The trilobite Eldredgeia venustus, from Bolivia, is the most common South American trilobite on today's fossil market,...
  
  
• Eldredgeops
  Eldredgeops
  Eldredgeops was a genus of trilobites in the order Phacopida, family Phacopina. They are from the Devonian time period. This genus has recently been created from a single species derived from Phacops and can be found in limestone deposits in Ohio....
  
  
• Elegantaspis
• Elegenodechenella
• Elegestina
  Elegestina
  Elegestina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Eleutherocentrus
  Eleutherocentrus
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Elganellus
  Elganellus
  Elganellus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Elicicola
  Elicicola
  Elicicola is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Elimaproetus
• Elkia
• Ellesides
• Ellipsocephaloides
• Ellipsocephalus
  Ellipsocephalus
  Ellipsocephalus is an extinct genus of blind trilobite that lived during the Cambrian. The genus comprises benthic species inhabiting deep, poorly-lit or aphotic habitats. E. Hoffi is a common trilobite mainly from central Europe ....
  
   (=Germaropyge)
• Ellipsostrenua
• Ellipsotaphrus
• Elliptocephala (=Georgiellus)
• Elliptophillipsia
• Ellsaspis
• Elongatanileus
• Elrathia
• Elrathiella (=Coelaspis; =Glossocoryphus)
• Elrathina
• Elsarella
• Elvinaspis
• Elvinia (=Moosia)
• Elviniella
• Elvinioides
• Elviraspis
• Elyaspis
• Elyx (=Eryx)

Em

• Emanuelaspis
• Emanuelina
  Emanuelina
  Emanuelina is a village in the administrative district of Gmina Czarnożyły, within Wieluń County, Łódź Voivodeship, in central Poland. It lies approximately north of Czarnożyły, north of Wieluń, and south-west of the regional capital Łódź.-References:...
  
  
• Emmrichops
• Emsurella
• Emsurina
• Emuella
  Emuella
  Emuella is a genus of trilobites of the family Emuellidae. Their fossils are found chiefly in Lower Cambrian strata of Australia....
  
  

En

• Enammocephalus
  Enammocephalus
  Enammocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Enantiaspis
  Enantiaspis
  Enantiaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Encrinurella
• Encrinuroides
• Encrinurus
  Encrinurus
  Encrinurus is a genus of trilobite that lived in what would be Africa, Asia, Australia, Europe, North America, and South America from the middle Ordovician to the early Devonian from 472—412.3 mya, existing for approximately .-Taxonomy:...
  
   (=Saoria)
• Endops
  Endops
  Endops is a genus of trilobite belonging to the proetid family Phillipsiidae which comes from the Permian of Japan. The type species is Paladin yanagisawai.-References:* Proetida fact sheet *Endops in Paleobiology db...
  
  
• Endymionia (=Endymion)
• Ensecoryphe
• Enshia
• Entomaspis (=Hypothetica)
• Entsyna
• Entsyna

Eo

• Eoacidaspis
• Eoagnostus
  Eoagnostus
  Eoagnostus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Eoampyx
• Eoanomocarella
• Eoapatokephalus
• Eoasaphiscellus (=Eoasaphiscus)
• Eoasaphiscus
• Eoasaphus (=Anorina)
• Eobronteus
• Eocatuniella
• Eochatiana
• Eocheirurus
• Eochuangia
  Eochuangia
  Eochuangia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Eocorynexochus
• Eocryphops
• Eoctenopyge
• Eocyphinium
• Eocyrtosymbole
• Eodalmanitina
• Eodindymene
• Eodiscus (=Deltadiscus)
• Eodontopleura
  Eodontopleura
  Eodontopleura is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Eodouposiella
• Eodrevermannia
• Eofallotaspis
• Eoharpes (=Harpina)
• Eohomalonotus (=Brongniartia)
• Eoinouyia
• Eoisotelus
• Eokaninia (=Kaniniella)
• Eokaolishania
• Eokaotaia
• Eokochaspis
• Eokosovopeltis (=Heptabronteus)
• Eoleonaspis (=Bojokoralaspis)
• Eolotagnostus
  Eolotagnostus
  Eolotagnostus is a genus of trilobite in the order Agnostida, which existed in what is now Gansu, China. It was described by Zhou in 1982, and the type species is Eolotagnostus gansuensis....
  
  
• Eomalungia
• Eomansuyia
• Eometopus
• Eomicrophillipsia
• Eomonorachus
• Eopalpebralia
• Eophacops
  Eophacops
  Eophacops is a genus of trilobites from the order Phacopida, family Phacopidae. These trilobites are from the Silurian age and can be distinguished from the genus Phacops by its size. Eophacops is very small, 2–3 cm. is average length...
  
   (=Bullicephalus)
• Eopharostoma
• Eopiriproetus
• Eoproetus
  Eoproetus
  Eoproetus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Eops
• Eoptychaspis
• Eoredlichia
  Eoredlichia
  Eoredlichia is an extinct genus of trilobite that lived during the early Cambrian in the Chengjiang fauna, China.- Sources :**...
  
   (=Archaeops; =Galloredlichia; = Pararedlichia)
• Eorobergia
• Eoryctocephalus
• Eosaukia (=Scolosaukia)
• Eoscutellum
• Eoshengia (=Baojingia)
• Eoshumardia
• Eosoproetus
• Eosoptychoparia
• Eospencia
• Eotaitzuia
• Eotingocephalus
• Eotrinucleus
• Eowinterbergia
• Eowuhuia
• Eozacanthoides

Er

• Erbenaspis
• Erbenia
• Erbenicoryphe
• Erbenites
• Erbenochile
  Erbenochile
  Erbenochile is a genus of spinose phacopid trilobite found in Lower to Middle Devonian age rocks from Algeria and Morocco. Originally described from an isolated pygidium , the first complete articulated specimen of E...
  
  
• Erbia (=Paratollaspis)
• Erbiella
  Erbiella
  Erbiella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Erbina
• Erbiopsidella
  Erbiopsidella
  Erbiopsidella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Erbiopsis
  Erbiopsis
  Erbiopsis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Erdelia
• Erdoradites
• Erediaspis
• Eremiproetus (=Dufresnoyiproetus)
• Erixanium
• Erkelina
• Ermanella
• Erratencrinurus
• Erratobalticus
• Erratojincella
• Erzishania (=Oreisator)

Es

• Esseigania
• Estaingia (=Hsuaspis)
• Estoniites
• Estoniops

Eu

• Euarthricocephalus
• Eudolatites
• Euduplora
• Eugonocare
• Eujinnania
• Euleiostegium
• Euloma (=Calymenopsis)
• Eulomella
• Eulomina
• Euonchonotina
• Euptychaspis
• Eurekia
• Eurostina
• Eurycare

Ex

• Exallaspis
• Exastipyx
• Excetra
• Exigua (=Brassicicephalus)
• Exochops
• Extrania

F

:

Fa

• Fabulaspis
• Faciura
• Failleana (=Opsypharus)
• Falanaspis
• Fallotaspidella
  Fallotaspidella
  Fallotaspidella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Fallotaspis
  Fallotaspis
  Fallotaspis is a Cambrian trilobite genus found in the United States and Morocco.-Sources:***...
  
  
• Famatinolithus
  Famatinolithus
  Famatinolithus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Fandianaspis
• Farsia
• Fastigaspis

Fe

• Feilongshania
  Feilongshania
  Feilongshania is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Feistia
• Fenestraspis
  Fenestraspis
  Fenestraspis is an extinct genus of trilobite in the order Phacopida from the Lower Devonian. Fenestraspis is unusual because of the development of extensive fenestrae in the posterior part of the body and apparently of the thorax, the presence of upwardly directed spines on the cephalon, thorax...
  
  
• Fengduia
• Fenghuangella (=Cyclolorenzellina)
• Fengtienia
• Fenniops
• Ferenepea
• Ferralsia
• Feruminops

Fi

• Fialoides
• Fieldaspis
• Finecrestia
• Fissanomocarella
• Fissocephalus

Fl

• Flabellocephalus
  Flabellocephalus
  Flabellocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Flectihystricurus
• Flexicalymene
  Flexicalymene
  Flexicalymene is a genus of trilobites of the order Phacopida, suborder Calymenina. They are found abundantly in North America. Flexicalymene specimens can be mistaken for Calymene, Gravicalymene, Diacalymene and a few other Calymenina genera. They are used as an index fossil in the Ordovician...
  
  
• Flexidechenella
• Flexiscutellum

Fo

• Folliceps
  Folliceps
  Flabellocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Forchammeria
• Fordaspis
• Forillonaria
• Formonia
• Formosocephalus
• Forteyops
• Foulonia
• Foveatella

Fr

• Fragiscutum
• Frammia
• Francenaspis
• Franconicabole
• Francovichia
• Fremontella
  Fremontella
  Fremontella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Frencrinuroides
• Frithjofia
• Fritzolenellus
• Frognaspis

Fu

• Fuchouia (=Parafuchouia; =Pseudofuchouia)
• Fuminaspis
  Fuminaspis
  Fuminaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Fuquania
• Furacopyge
• Furcalithus
  Furcalithus
  Furcalithus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Furia
• Fuscinipyge
• Fuyunia
• Fuzhouwania

G

:

Ga

• Gabriceraurus
• Gabriellus
  Gabriellus
  Gabriellus is an extinct genus from a class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Galahetes
• Galbagnostus
• Galeaspis
• Galerosaukia
• Gallagnostus
  Gallagnostus
  Gallagnostus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Gamonedaspis
• Gangdeeria
• Ganinella
• Ganovexopyge (=Scottia)
• Gaoloupingia
• Gaotanaspis
• Gaotania
• Gapeevella
• Gaphuraspis
• Garbiella
• Gaspelichas
• Gastropolus (=Lisogoraspis)

Ge

• Gedongaspis
• Geesops
• Geigibole
• Gelasene
  Gelasene
  Gelasene is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Genalaticurus
• Genevievella (=Placosema; =Nixonella; =Torridella)
• Georhithronella
• Geracephalina
• Geragnostella
• Geragnostus (=Geratrinodus; =Neptunagnostella)
• Geraldinella
  Geraldinella
  Geraldinella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Gerasaphes
• Gerastos (=Dohmiella; =Kegeliella)

Gi

• Gibscherella
• Gigantopygus
  Gigantopygus
  Gigantopygus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Gignopeltis
• Gigoutella
  Gigoutella
  Gigoutella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Giordanella
• Girandia
  Girandia
  Girandia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Girvanopyge (=Cremastoglottos; =Gamops; =Nanlingia)
• Gitarra

Gl

• Glaberagnostus (=Toragnostus)
• Glabrella
• Glabretina
• Gladiatoria
  Gladiatoria
  Gladiatoria is the name given to an anonymous mid 15th century German Fechtbuch, formerly kept at the Preussische Königliche Staatsbibliothek in Berlin, now at the Biblioteka Jagiellońska in Kraków, Poland...
  
  
• Glaphurella
• Glaphurina
• Glaphurus
• Glaphyraspis (=Raaschella)
• Globampyx
  Globampyx
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Globulaspis
• Globusia
• Globusiella
• Globusoidea
• Gloria
• Glossicephalus
• Glossopleura (=Sonoraspis)
• Glyphanellus
• Glyphaspellus
• Glyphaspis (=Americare)
• Glyphopeltis
  Glyphopeltis
  Glyphopeltis is a genus of fungi within the Psoraceae family.-External links:* at Index Fungorum...
  
  
• Glyptagnostus (=Barrandagnostus)
• Glyptambon
  Glyptambon
  Glyptambon is an extinct genus of Silurian trilobite in the order Phacopida. It is a member of the family Dalmanitidae and the subfamily Dalmanitinae, although it has been classified in the related Ordovician subfamily Mucronaspidinae. The type species G. verrucosus was once placed in Dalmania...
  
  
• Glyptometopsis
• Glyptometopus

Go

• Gog
• Gogiura
• Gogoella
• Golasaphus
• Goldillaenoides
• Goldillaenus
• Gomiites
• Goniagnostus
• Gonicheirurus
• Goniophrys
• Gonioteloides
• Gonzaloia
• Gorskia
• Goumenzia
• Gourdonia
• Goycoia

Gr

• Gracemerea
• Graciella
• Gracilocoryphe
• Grandagnostus
• Grandioculus
  Grandioculus
  Grandioculus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
   (=Honania)
• Granitzia
• Granolenus
• Granularaspis (=Granularia)
• Granuloagnostus
• Granutaspis
• Gratagnostus
• Gravicalymene
  Gravicalymene
  Gravicalymene is a genus of trilobites from the order Phacopida, suborder Calymenia. Gravicalymene has been a 'hot button' trilobite lately. The species that are currently in this genus have been in Calymene and Sthenocalymene...
  
  
• Greenops
  Greenops
  Greenops is a mid-sized Devonian trilobite of the order Phacopida, subfamily Asteropyginae.They are mainly reported from the mid-Devonian Hamilton Group of upstate New York and southwestern Ontario...
  
  
• Griffithidella
• Griffithides
• Grinnellaspis
  Grinnellaspis
  Grinnellaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
   (=Actinopeltis)
• Griphasaphus
  Griphasaphus
  Griphasaphus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Groenwallia
• Groenwallina
• Grossoproetus
• Gruetia

Gu

• Guancenshania
• Guandacolithus
• Guangnania
  Guangnania
  Guangnania was a genus of Early Devonian land plant with branching axes. It is thought to be related to the zosterophylls....
  
  
• Guangxiaspis
• Guangyuanaspis
  Guangyuanaspis
  Guangyuanaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Guangyuania
• Guankouia
• Gudralisium
• Guichenia
• Guilinaspis
• Guizhouanomocare
• Guizhoucephalina
• Guizhouhystricurus
• Guizhoupliomerops
• Guluheia
• Gunnia (=Ellotia; =Yiliangaspis)
• Guohongjunia
• Guozia
• Guraspis
• Gushanaspis

H

:

Ha

• Haasia
• Habrocephalus
  Habrocephalus
  Habrocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Hadragnostus (=Formosagnostus; =Kunshanagnostus)
• Hadraspis
• Hadrocephalites
• Hadrohybus
  Hadrohybus
  Hadrohybus is an extinct genus of trilobite in the order Phacopida.-External links:* at the Paleobiology Database...
  
  
• Hadrokraspedon
• Hadromeros
  Hadromeros
  Hadromeros is an extinct genus of trilobite in the order Phacopida. It contains one species, H. elongatus.-External links:* at the Paleobiology Database...
  
  
• Hadrorachus
• Hagiorites
• Haliplanktos
• Hallandclarkeops
• Hallanta
• Hamashania
• Hamatolenus
• Hamiroproetus
• Hammannopyge
• Hamptonella
• Hanburia
  Hanburia
  Hanburia is a genus of trilobite known from the Middle Cambrian Burgess Shale....
  
  
• Hanchungolithus (=Ichangolithus; =Yinjiangolithus)
• Hancrania
• Hanivella
• Haniwa
  Haniwa
  The are terracotta clay figures which were made for ritual use and buried with the dead as funerary objects during the Kofun period of the history of Japan....
  
  
• Haniwoides (=Yuepingia)
• Hanjiangaspis
• Hanshania
• Hanzhongaspis
• Hapalopleura
• Hapsiceraurus
• Hapsidocare
• Harataspis
• Hardyia
• Hardyoides (=Norwoodina)
• Harpes (=Helioharpes; =Reticuloharpes)
• Harpidella (=Rhinotarion)
• Harpides
  Harpides
  Harpides is an extinct genus of trilobite.-External links:**...
  
  
• Harpidoides
• Harpillaenus
• Harringtonacaste
• Hartella
• Hartshillia
• Hartshillina
• Hassiabole
• Hastagnostus
  Hastagnostus
  Hastagnostus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Hastiremopleurides
• Hatangia
  Hatangia
  Hatangia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Hawkinsaspis (=Hawkinsia)
• Hawleia
• Hazarania

He

• Hebediscina (=Szechuanaspis; =Zhenbadiscus)
• Hebediscus
• Hebeia
• Hedinaspis
• Hedstroemia
  Hedstroemia
  The extinct genus Hedstroemia is thought to be a rivulariacean cyanobacterium. It occurs in conjunction with Solenopora. It forms oval blobs composed of sinuous tubes that have rounded outlines....
  
   (=Milesdavis; =Pachyproetus)
• Hejinaspis
• Helepagetia
• Helieranella
• Heliomera
  Heliomera
  Heliomera is an extinct genus of trilobite in the order Phacopida. It contains two species. H. albata and H. sol.-External links:* at the Paleobiology Database...
  
  
• Heliomeroides
• Helioproetus
• Heliopyge (=Alcaldops)
• Helmutia
• Helokybe
  Helokybe
  Helokybe is a genus of trilobite....
  
  
• Hemiarges (=Choneilobarges)
• Hemibarrandia
• Hemicricometopus
• Hemikaolishania
• Hemirhodon
• Henadoparia
  Henadoparia
  Henadoparia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Hentigia
• Heraspis
• Hercantyx
• Herse
  Herse
  Herse is a figure in Greek mythology, daughter of Cecrops, sister to Aglauros and Pandrosos.According to Apollodorus, when Hephaestus unsuccessfully attempted to rape Athena, she wiped his semen off her leg with wool and threw it on the ground, impregnating Gaia...
  
  
• Hesa
  HESA
  HESA may refer to:* Iran Aircraft Manufacturing Industrial Company, an Iranian aircraft manufacturer* Higher Education South Africa, an association of universities in South Africa...
  
  
• Hesslerides
• Heterocaryon
• Heterocyclopyge (=Selenoptychus)
• Heukkyoella
• Hewenia
• Hexacopyge
• Hexacosta

Hi

• Hibbertia
  Hibbertia
  Hibbertia, or Guinea flower, is a genus of trees, shrubs, trailing shrubs and climbers of the family Dilleniaceae. The five-petalled flowers of all species are varying shades of yellow, with the exception of H. stellaris, H. miniata and H. selkii, a recently named species from the Stirling...
  
   (=Harpesoides; =Metaharpes; =Paraharpes; =Thorslundops; =Wegelinia)
• Hicksia
  Hicksia
  Hicksia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Hidascutellum
• Highgatella
• Hildaphillipsia
• Hillyardina (=Metabowmania)
• Hintzecurus
• Hintzeia
• Hispaniaspis
• Histiomona
  Histiomona
  Histiomona is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  

Ho

• Hoekaspiella
• Hoekaspis
  Hoekaspis
  Hoekaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Hoffetella
• Holanshania
• Holasaphus
• Holcacephalus
• Holdenia (=Tiresias)
• Holia
  Holia
  Holia is an extinct genus of trilobite in the order Phacopida. It contains four species, H. cimelia, H. glabra, H. secristi, and H. anacantha.-External links:* at the Paleobiology Database...
  
   (=Ainoa)
• Hollardia
• Hollardops (=Modellops; =Philipsmithiana)
• Holmdalia
• Holmia (=Esmeraldina)
• Holmiella
  Holmiella
  Holmiella is a genus of fungi in the order Patellariales. There are 2 species....
  
  
• Holocephalina (=Carausia)
• Holocephalites
• Holotrachelus
• Holoubkocheilus
• Holteria
• Holubaspis (=Holubia)
• Holyoakia
  Holyoakia
  Holyoakia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period. It usually is found near the fossilized remains of pods of...
  
  
• Homagnostoides
• Homagnostus
  Homagnostus
  Homagnostus is a genus of trilobite in the order Agnostida, which existed in what is now north Wales. It was described by Howell in 1935. The genus was originally considered to be Agnostus pisiformis var. obesus ....
  
  
• Homalonotus
  Homalonotus
  Homalonotus is an extinct genus of trilobite in the order Phacopida. It contains several species including H. armatus and H. roemeri.-External links:* at the Paleobiology Database...
  
  
• Homalopteon
• Homalopyge
• Homolichas
• Honanaspis
• Hongjunshaoia
• Hongshiyanaspis
  Hongshiyanaspis
  Hongshiyanaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Hoplolichas (=Cyranolichas)
• Hoplolichoides
• Horbusonia
• Horonastes
• Hospes
• Houmaia
• Houmengia
• Housia (=Housiella)
• Hoytaspis

Hu

• Huaibeia
• Huainania
• Hualongella
• Hualongia
• Huamiaocephalus
• Huangnigangia
• Huangshiaspis
• Huaquinchaia
• Huayuania
• Huemacaspis
• Huenickenolithus
• Huilichia
• Hukasawaia
• Humaencrinuroides
• Humeia
• Humilogriffithides
• Hunanaspis
• Hunanocephalus
• Hunanolenus
• Hunanoproetus
• Hunanopyge
• Hundwarella (=Anomocaraspis)
• Hungaia (=Acrohybus)
• Hungioides (=Argentinops)
• Hunjiangaspis
• Hunjiangites
• Hunnebergia
  Hunnebergia
  Hunnebergia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Huntoniatonia (=Huntonia)
• Huochengella
• Huochengia
• Hupeia
  Hupeia
  Hupeia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Hupeolenus
• Hupetina
• Huzhuia

Hy

• Hyboaspis
• Hybocephalus
• Hydrocephalus
  Hydrocephalus
  Hydrocephalus , also known as "water in the brain," is a medical condition in which there is an abnormal accumulation of cerebrospinal fluid in the ventricles, or cavities, of the brain. This may cause increased intracranial pressure inside the skull and progressive enlargement of the head,...
  
   (=Phlysacium; =Rejkocephalus)
• Hypagnostus (=Cyclopagnostus; =Breviagnostus; =Metahypagnostus)
• Hypaproetus
• Hyperbolochilus
• Hypermecaspis (=Spitsbergaspis)
• Hyperoparia
• Hypodicranotus
  Hypodicranotus
  Hypodicranotus is an extinct genus of trilobite in the order Asaphida. It contains one species, H. striatulus.-External links:* at the Paleobiology Database...
  
  
• Hypsipariops
• Hyrokybe (=Shiqiania)
• Hysterolenus (=Hectoria)
• Hysteropleura (=Apedopyanus)
• Hystricurus (=Vermilionites)

I

:

Id

• Idamea
• Iddingsia (=Plataspella)
• Ideria
• Idiomesus
• Idiorhapha
• Idioura
• Idolagnostus
  Idolagnostus
  Idolagnostus is a genus of trilobite in the order Agnostida, which existed in what is now Queensland, Australia. It was described by Öpik in 1967, and the type species is Idolagnostus agrestis....
  
  
• Iduia

Il

• Illaenoides
• Illaenopsis (=Eurymetopus; =Procephalops; =Rokycania; =Pseudobarrandia)
• Illaenoscutellum
• Illaenula
• Illaenurus
• Illaenus
  Illaenus
  Illaenus is a genus of trilobites from Russia and Morocco, from the middle Ordovician.- External links :*http://www.indiana9fossils.com/Trilobites/Russian-Trilobites.htm*http://www.paleoart.com/catalog/382/Illaenus...
  
   (=Cryptonymus; =Actinolobus; =Deucalion; =Svobodapeltis)
• Illtydaspis

In

• Incaia
• Inella
  Inella (trilobite)
  Inella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Inglefieldia
• Ingriops
• Iniospheniscus
• Iniotoma
• Inkouia (=Agalatus)
• Innitagnostus
  Innitagnostus
  Innitagnostus is a genus of trilobite in the order Agnostida, which existed in what is now Queensland, Australia. It was described by Öpik, 1967, and the type species is Innitagnostus innitens....
  
  
• Inosacotes
• Inouyella
  Inouyella
  Inouyella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Inouyia
  Inouyia
  Inouyia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Inouyina
• Inouyops
• Inoyellaspis
• Interalia
• Interproetus

Ir

• Iranaspidion
• Iranaspis
• Iranella
• Iranochresterius
• Iranochuangia
• Iranoleesia (=Irania; =Heyelingella)
• Irgitkhemia
• Irinia
  Irinia
  Irinia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Irvingella (=Irvingellina; =Komaspis)
• Irvingelloides

Is

• Isabelinia
• Isalaux
• Isalauxina
• Isbergia
• Ischyrotoma
• Ishpella
• Isidreana
• Isidrella
• Isocolus (=Astyages)
• Isoprusia (=Mauraspis)
• Isotella
• Isoteloides
• Isotelus
  Isotelus
  Isotelus is a genus of asaphid trilobite from the middle and upper Ordovician period, fairly common in the Northeastern United States, northwest Manitoba, southwestern Quebec and southeastern Ontario...
  
   (=Homotelus)
• Issafeniella
• Isyrakella
• Isyrakopeltis

It

• Itcheriella
• Ithycephalus
• Ithyektyphus
  Ithyektyphus
  Ithyektyphus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Itydeois
• Ityophorus

Iv

• Ivanopleura
• Iveria
• Ivshinagnostus
  Ivshinagnostus
  Ivshinagnostus is a genus of trilobite in the order Agnostida, which existed in what is now Kazakhstan. It was described by Ergaliev in 1980, and the type species is Ivshinagnostus ivshini....
  
  
• Ivshinaspis

J

:

Ja

• Jakutus
• Jangudaspis
  Jangudaspis
  Jangudaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Janshinicus
• Japonoscutellum
• Jasmundia
• Jasperia

Je

• Jeffersonia
  Jeffersonia
  Jeffersonia which is also known as twinleaf or rheumatism root, is a small genus of herbaceous perennial plants in the family Berberidaceae. The two species are native to eastern Asia and eastern North America. They are uncommon spring wildflowers, which grow in limestone soils of rich woodland...
  
   (=Bathyurina)
• Jegorovaia (=Hermosella)
• Jenkinsonia
• Jessievillia

Ji

• Jiagouia
• Jialaopsis
• Jianchangia
• Jiangjunshania
• Jiangnania
• Jiangsuaspis
• Jiangsucephalus
• Jiangsuia
• Jiangxiaspis
• Jianxilithus
• Jiawangaspis
• Jiia
• Jimachongia
• Jimanomocare
• Jimaoshania
• Jimbokranion
• Jinanaspis
• Jincella
• Jingheella
• Jingxiania
• Jingyangia
  Jingyangia
  Jingyangia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Jinia
• Jinshaella
• Jinxiaspis
• Jiubaspis
• Jiumenia
• Jiuquania
• Jiuxiella (=Miboshania)
• Jiwangshania
• Jixianaspis
• Jixianella (=Jixiania)

Ju

• Jubileia
• Jucundaspis
• Judaiella
  Judaiella
  Judaiella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Judomia
• Judomiella
  Judomiella
  Judomiella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Jujuyaspis (=Alimbetaspis)
• Jujuyops
• Juliaspis
• Junggarella
• Juraspis
• Juriietella

K

:

Ka

• Kabuqiia
• Kabutocrania
• Kadyella
  Kadyella
  Kadyella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Kailia
• Kailiella
• Kainella
• Kainellina
• Kainelloides
• Kainisiliellina
• Kainops
  Kainops
  Kainops is a genus of trilobites from the family Phacopidae, order Phacopida. It can be distinguished from Paciphacops by the greater number of facets to the eye . The form of the furrow between the palpebral area and the palpebral lobe also distinguishes Kainops from the genera Paciphacops and...
  
  
• Kaipingella
• Kaltykelina
• Kameschkoviella
  Kameschkoviella
  Kameschkoviella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Kaninia (=Kaniniella; =Dolgaia)
• Kaniniella
• Kanlingia
• Kannoriella
• Kanoshia
• Kaolishania
• Kaolishaniella
• Kaotaia
• Karagandoides
• Karataspis
• Karginella
• Kasachstanaspis
• Kasachstania
• Kasatchaspis
• Kaskia
• Kassinius
• Kathleenella
• Kathrynia
• Kathwaia
• Katunia
• Katunicare
• Kaufmannella (=Kaufmannia)
• Kawina
  Kawina
  Kawina is an extinct genus of trilobite in the order Phacopida. It contains one species, K. wilsoni.-External links:* at the Paleobiology Database...
  
   (=Cydonocephalus)
• Kayseraspis
• Kayserops
• Kazelia (=Kazellina)

Ke

• Keeleaspis
  Keeleaspis
  Keeleaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Keguqinia
• Keilapyge
• Keithia
• Keithiella
• Kendallina (=Kendallia)
• Kennacryphaeus
• Kepingaspis
  Kepingaspis
  Kepingaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Kepisis
• Kepisis
• Kerfornella
• Kermanella
• Kerpenella
• Kettneraspis (=Grossia)
• Ketyna (=Kujandaspis)

Ki

• Kielanella
• Kielania (=Lowtheria)
• Kijanella
  Kijanella
  Kijanella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Kilmahogia
• Kindbladia
• Kinderlania
• Kingaspidoides (=Elatius)
• Kingaspis (=Mesetaia)
• Kingstonella
• Kingstonia
  Kingstonia
  Kingstonia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
   (=Ucebia)
• Kingstonioides
• Kiowaia
• Kirengina
• Kirkdomina
• Kiskinella
• Kistocare
• Kitatella

Kl

• Klabavia
• Kleptothule
• Klimaxocephalus
• Klotziella
• Kloucekia

Ko

• Kobayashella
• Kobayashia
• Kobayashipeltis
• Kobdus
• Kochaspis
• Kochiella (=Eiffelaspis)
• Kochiellina
• Kochina
• Kodymaspis
• Kogenium
• Koksorenus
• Kokuria
• Kolbaspis
  Kolbaspis
  Kolbaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Kolbinella
  Kolbinella
  Kolbinella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Koldinia
• Koldiniella
  Koldiniella
  Koldiniella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Koldinioidia (=Akoldinioidia)
• Kolihapeltis
  Kolihapeltis
  Kolihapeltis is a genus of trilobite that lived from the Early Devonian to the Middle Devonian. Its remains have been found in Africa and Europe.- Sources :...
  
  
• Kollarcephalus
• Kolymella
  Kolymella
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Kolymoproetus
• Komaspidella
  Komaspidella
  Komaspidella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
   (=Buttsina; =Ataktaspis)
• Koneprusia
• Koneprusites
• Kontrastina
• Kootenia
  Kootenia
  Kootenia is a genus of trilobites of the family Dorypygidae. Its major characteristics are that of the closely related Olenoides, including medium size, a large glabella, and a medium-sized pygidium, but also a lack of the strong interpleural furrows on the pygidium that Olenoides...
  
   (=Notasaphus)
• Kooteniella (=Babakovia)
• Kooteniellina
• Kootenina
• Koptura (=Parakoptura)
• Kopungiella
• Koraipsis
• Kormagnostus (=Kormagnostella; =Litagnostoides)
• Korobovia
  Korobovia
  Korobovia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Kosovopeltis (=Heptabronteus)
• Kosovoproetus
• Kotuia
• Kotysopeltis
• Kounamkites
• Kozlowskiaspis

Ku

• Kuanyangia
  Kuanyangia
  Kuanyangia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Kueichowia
  Kueichowia
  Kueichowia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Kujandina
• Kuljumbina
• Kulmiella
• Kulmogriffithides
• Kunmingaspis (=Benxiaspis)
• Kunshanaspis
• Kuraspis
• Kuraspoides
• Kuruktagaspis
• Kutsingocephalus

L

:

La

• Labiostrella
• Labiostrina (=Abia)
• Labradoria
  Labradoria
  Labradoria is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
   (=Sinolenus)
• Labradorina
• Lachnostoma
  Lachnostoma
  Lachnostoma is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Lacorsalina
  Lacorsalina
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Lacunoporaspis
• Laethoprusia
• Laevibole
• Lajishanaspis
• Lakaspis
• Lamanskytes
• Laminurus
• Lampropeltastes Dengler, 2008 (= Lampropeltis Öpik 1967 non Cope, 1860: preoccupied)
• Lamproscutellum
• Lancastria
  Changaspis
  Changaspis is an extinct genus of trilobite that lived during the lower Cambrian, part of the Corynexochida.- Sources :**-External links:*...
  
   (=Changaspis; =Chienaspis; =Goldfieldia; =Paraoryctocephalops; =Pseudolancastria)
• Landyia
• Laneites
• Langgonbole
• Langgonia
• Langqia
• Langyashania
• Laoyingshania
• Lapidaria
  Lapidaria (animal)
  Lapidaria is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Lardeuxia
• Larifugula
• Lasaguaditas
• Lasarchopyge
• Lashushania
• Latecephalus
• Lateuloma
• Latibole
• Laticephalus
  Laticephalus
  Laticephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Laticoryphe
• Latiglobusia
• Latikingaspis
• Latilorenzella (=Wuania)
• Latipalaeolenus
• Latiproetus
• Latiredlichia
• Latouchia
• Latuzella
• Lauchellum
• Laudonia
  Laudonia
  Laudonia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Lauzonella
• Lavadamia
• Lazarenkiura

Le

• Lecanoaspis
• Lecanopleura
• Lecanopyge
• Lehua
  Lehua
  Lehua is a small, crescent-shaped island in the Hawaiian islands, only north of Niihau, due west of Kauai. The uninhabited, barren island is a tuff cone which is part of the extinct Niihau volcano....
  
  
• Leiagnostus (=Ciceragnostus)
• Leiaspis
• Leichneyella
• Leichuangia
• Leimitzia
• Leiobienvillia
• Leiocoryphe
• Leiolichas
• Leioscutellum
• Leioshumardia
• Leiostegina
• Leiostegium (=Endocrania)
• Leiostrototropis
• Lejopyge
• Lemdadella
  Lemdadella
  Lemdadella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Lenacare
• Lenadiscus
• Lenagraulos
• Lenallina
  Lenallina
  Lenallina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Lenaspis
• Leningradites
• Leocephalus
• Leoforteyia
• Leonaspis
  Leonaspis
  Leonaspis is a genus of trilobite that lived from the Late Ordovician to the early Devonian, and to date has been found on all continents except Antarctica.-Sources:* Fossils by David Ward...
  
   (=Acanthaloma)
• Lepidoproetus
• Leptochilodiscus
  Leptochilodiscus
  Leptochilodiscus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
   (=Kerberodiscus)
• Leptochuangia
• Leptopilus
• Leptoplastides (=Andesaspis; =Beltella; =Chunkingaspis; =Parabolinopsis; =Rampartaspis)
• Leptoplastus
• Leptoredlichia (=Paraleptoredlichia)
• Lermontovia
• Lermontoviella
• Letniites
• Leurostega
• Leviceraurus
• Levinia
• Levisaspis
• Levisella
• Levisia

Li

• Lianglangshania
• Liangshanocephalus
• Lianhuashania
• Liaoningaspis
• Liaoningella
• Liaotropis
• Libertella
• Lichakephalus
• Lichanocoryphe
• Lichapyge (=Macropygella)
• Lichas
  Lichas
  In Greek mythology, Lichas was Hercules' servant, who brought the poisoned shirt from Deianira to Hercules because of her jealousy of Iole, killing him...
  
   (=Apolichas; =Autolichas)
• Lichengaspis
• Lichengia
• Lichokephalina
• Licnocephala (=Domina)
• Liexiaspis
• Ligiscus
• Limataceps
• Limbocalymene
• Limniphacos
• Limouolenus
• Limpeina
• Linguagnostus (=Cristagnostus)
• Linguaphillipsia
• Linguaproetus
• Linguchuangia
• Linguisaukia
• Lingukainella
• Linguocalymene
• Lingyuanaspis
• Liobole
• Liobolina
• Liocalymene
• Liocare
  Liocare
  Liocare is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Liocnemis
• Lioharpes (=Fritchaspis)
• Liokootenia
• Liolalax (=Lalax)
• Liolophops
• Liomegalaspides
• Lioparella (=Zhuozishania)
• Lioparia
  Lioparia
  Lioparia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
   (=Lorentzia)
• Liopeishania
• Liopelta
  Liopelta
  Liopelta is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Liosolenopleura
• Liostracina
• Liquania
• Liriamnica
• Lisania
  Lisania
  Lisania is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
   (=Aojia)
• Lisogoragnostus (=Abagnostus; =Scanagnostus)
• Lisogorites (=Trigonoaspis; =Tangyaia)
• Listroa
• Litaspis
  Litaspis
  Litaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Litavkaspis
• Litocephalus
• Litometopus
• Litotix
• Liuheaspis
• Liushuicephalus
• Liwia
  Liwia
  Liwia is a genus of nektaspid, a soft-bodied stem-group chelicerate....
  
   (=Livia)

Ll

• Llandovacaste
• Llanoaspidella
  Llanoaspidella
  Llanoaspidella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Llanoaspis
  Llanoaspis
  Llanoaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Lloydia
• Lloydolithus
  Lloydolithus
  Lloydolithus is a genus of trilobite from the Late Ordovician of Europe.-External links:* in the Paleobiology Database...
  
  

Lo

• Lobopyge (=Belenopyge)
• Lochkovella
• Lochmanaspis
• Lochmanolenellus
• Lodenicia
• Loeipyge
• Loganellus (=Highgatea)
• Loganopeltis
• Loganopeltoides
• Lohanpopsis
• Lomsucaspis
  Lomsucaspis
  Lomsucaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Lonchinouyia
• Lonchobasilicus (=Sinomegalaspis)
• Lonchocephalus
  Lonchocephalus
  Lonchocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
   (=Bucksella)
• Lonchodomas
  Lonchodomas
  Lonchodomas is an extinct genus of trilobite from the Ordovician period.-References:* Dinosaurs to Dodos: An Encyclopedia of Extinct Animals by Don Lessem and Jan Sovak...
  
  
• Lonchopygella
• Longduia
  Longduia
  Longduia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Longianda
  Longianda
  Longianda is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Longicoryphe
• Longilobus
• Longiproetus
• Longlingaspis
• Longmenshania
• Longshania
• Longxianaspis
• Longxumenia
• Loparella
• Lopeuloma
• Lophiokephalion
• Lophodesella
• Lophoholcus
  Lophoholcus
  Lophoholcus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Lophosaukia
• Lopnorites
• Lordshillia
  Lordshillia
  Lordshillia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Lorenzella
• Loriella
• Lorrettina
• Loshanella
• Lotagnostus
  Lotagnostus
  Lotagnostus is a genus of trilobite in the order Agnostida, which existed in what is now England. It was described by Whitehouse in 1936, and the type species is Lotagnostus trisectus, which was originally described as a species of Agnostus by Salter in 1864....
  
  
• Lotosoides
• Lotzeia
• Loulania
• Loxonepea
  Loxonepea
  Loxonepea is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Loxoparia
• Loxopeltis

Lu

• Luaspides
• Luaspis
  Luaspis
  Luaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Lugalella
• Luguoia
• Luhops
• Luia
• Luliangshanaspis
• Lulongia
• Lunacephalus
• Lunacrania (=Paranumia)
• Lunolenus
• Luojiashania
• Luonanocephalus
• Luotuolingia
• Lusampa
• Lusatiops
  Lusatiops
  Lusatiops is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
   (=Jalonella)
• Lutesvillia
  Lutesvillia
  Lutesvillia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Luvsanodiscus
• Luxella
• Luyanhaoaspis (=Luaspis)
• Luyanhaoia

Ly

• Lycophron
  Lycophron
  Lycophron was a Hellenistic Greek tragic poet, grammarian, and commentator on comedy, to whom the poem Alexandra is attributed .-Life and miscellaneous works:...
  
  
• Lydiaspis
  Lydiaspis
  Lydiaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Lygdozoon
• Lynaspis
  Lynaspis
  Lynaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Lyralichas
• Lyrapyge
  Lyrapyge
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Lyriaspis

M

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Ma

• Macannaia
• Macelloura
• Machairagnostus
• Mackenziurus
• Macnairides
• Macroblepharum
• Macrobole
• Macrogrammus
  Macrogrammus
  Macrogrammus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Macronoda (=Promesus)
• Macropyge (=Haniwapyge)
• Macrotoxus
• Madaoyuites
• Madaraspis
• Madarocephalus
• Madianaspis
• Maduiya
• Madygenia (=Pseudobirmanites)
• Magnacephalus
• Magnomma
• Mahaiella
• Maiaspis
  Maiaspis
  Maiaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Majiangia
• Makbelaspis
• Maladia
• Maladioidella (=Kuruktagella; =Cedarellus)
• Maladioides
• Maladiopsis
• Malayaproetus
• Malchi
• Malimanaspis (=Goodsiraspis)
• Malinaspis
• Malladaia
• Mallagnostus (=Ladadiscus; ?=Jinghediscus)
• Malongocephalus
  Malongocephalus
  Malongocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Malongullia (=Ampyxinops)
• Malvinella
• Malvinocooperella
• Malykania
  Malykania
  Malykania is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Manailina
• Manaspis
• Manchuriella
• Manitouella
• Mannopyge
• Mansiella
• Mansuyella
• Mansuyia
• Mansuyites (=Parapalacorona)
• Mantoushania
• Manublesia
• Maopingaspis
  Maopingaspis
  Maopingaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Maotunia
• Mapania
  Mapania
  Mapania is a genus of plant in family Cyperaceae. It contains the following species :* Mapania ferruginea, Ridl....
  
  
• Mapanopsis
• Marcouella
• Mareda
• Marekolithus
• Marjumia
• Markhaspis
• Marrolithoides
• Marrolithus
• Maryvillia
  Maryvillia
  Maryvillia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Maspakites
• Matania
  Matania
  Matania is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Mataninella
• Maurotarion (=Goniopleura; =Branisella; =Tricornotarion)
• Maximovella
• Mayiella
  Mayiella
  Mayiella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  

Me

• Meadowtownella
  Meadowtownella
  Meadowtownella is a rare species of Trilobite found in Ordovician rocks. It is similar to Acidaspis cincinnatiensis but without the occipital spine....
  
  
• Mecophyrs
• Megadundabergia
• Megagnostus
• Megagraulos
• Megalaspidella
  Megalaspidella
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Megalaspides
  Megalaspides
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
   (=Lannacus)
• Megalisania
• Megalopsis
• Megapalaeolenus
  Megapalaeolenus
  Megapalaeolenus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. They lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Megaproetus
• Megasaphus
• Megatemnoura
• Megistaspidella (=Spinopyge)
• Megistaspis (=Megalaspis; =Megistaspinus; =Rhinaspis)
• Meisteraspis
• Meisterella
• Meitanella
  Meitanella
  Meitanella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 million to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Meitania
• Meitanillaenus
• Meitanopsis
• Melopetasus
• Memmatella
• Mendodiscus
• Mendogaspis
• Mendolaspis
  Mendolaspis
  Mendolaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Mendosina
• Mendospidella
• Meneghinella
• Meneviella (=Menevia)
• Mengzia
• Meniscocoryphe
• Meniscuchus
  Meniscuchus
  Meniscuchus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Menneraspis
• Menocephalites (=Parataitzuia)
• Menocephalus
• Menomonia (=Densonella; =Millardia)
• Menoparia
• Menorcaspis
• Mephiarges
• Merebolina
• Meridioscutellum
• Merlinia
  Merlinia
  Merlinia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Meropalla
• Meroperix
• Mesoctenopyge
• Mesolenellus
• Mesonacis
  Mesonacis
  Mesonacis is an extinct genus of trilobite that lived during the Cambrian, found in Wales and Australia....
  
   (=Fremontia)
• Mesotaphraspis
• Metaacidaspis
• Metabalangia
• Metacalvinella
• Metacalymene
• Metacanthina
• Metacryphaeus
• Metadoxides (=Anadoxides)
• Metagraulos
• Metaharpides
• Metakootenia
• Metaleiolichas
• Metalichas
• Metalioparella
• Metalisania
• Metalonchodomas
• Metanomocare
• Metanomocarella
• Metaphillipsia
• Metapianaspis
• Metapilekia
• Metapliomerops
• Metaprodamesella
• Metaptychopyge
• Metaredlichia
  Metaredlichia
  Metaredlichia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Metarthricocephalus
• Metascutellum
• Metashantungia
• Metayuepingia
• Meteoraspis
  Meteoraspis
  Meteoraspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
   (=Greylockia; =Coleopachys)
• Metisaspina
• Metisaspis
  Metisaspis
  Metisaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Metisella
  Metisella
  Metisella is a genus of skippers, commonly called sylphs, in the family Hesperiidae found in Africa. For other sylphs see genera Astictopterus and Tsitana.-Species:*Metisella abdeli...
  
  
• Metopolichas (=Metopias; =Holoubkovia; =Macroterolichas)
• Metopotropis
  Metopotropis
  Metopotropis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Mexicaspis
• Mexicella

Mi

• Miaeuloma
• Mial
  Mial
  Mial, or more correctly pronounced Miyal are a Rajput tribe found mainly in northern districts of Punjab, Pakistan. They are one of a number of small clans of Muslim agriculturists scattered over the Pothohar plateau region, who claim to be Rajput. According to some traditions, the Mial are Qureshi...
  
  
• Mianxianella
• Miaobanpoia
• Miaopopsis
• Micagnostus
• Micangshania
• Micmacca
• Micmaccopsis
• Micragnostus
  Micragnostus
  Micragnostus is a genus of trilobite in the order Agnostida, which existed in what is now north Wales. It was described by Howell in 1935, and the type species is Micragnostus calvus, which was originally described as a species of Agnostus by Lake in 1906....
  
  
• Micragraulos
• Microdiscus
  Microdiscus
  Microdiscus is a genus of fungi in the Helotiales order. The relationship of this taxon to other taxa within the order is unknown , and it has not yet been placed with certainty into any family.-External links:*...
  
  
• Microparia (=Gallagnostoides)
• Microphillipsia
• Microryctocara
• Microscutellum
• Microspatulina
• Mictosaukia
• Mictosaukioidia
• Milaspis
• Mimana
• Mimocryphaeus
• Mindycrusta
• Minicephalus
  Minicephalus
  Minicephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Minkella
• Minupeltis
• Minusinella
• Mioptychopyge
• Mirabole
• Miraculaspis
  Miraculaspis
  Miraculaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Miranda
• Miranella
  Miranella
  Miranella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Miraspis (=Elbaspis)
• Miriproetus
• Mischynogorites
• Misszhouia
  Misszhouia
  Misszhouia longicaudata is a species of blind, trilobite-like arthropod from the Cambrian period. In 1984 a well-preserved fossil of Misszhouia was discovered in the Maotianshan Shale; this discovery brought the shale to scientific attention.M...
  
  
• Mitchellaspis (=Mitchellia)

Mo

• Modocia (=Armonia; =Metisia; =Perioura; =Semnocephalus)
• Mohicana
• Monanocephalus
• Monkaspis
  Monkaspis
  Monkaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
   (=Kushanopyge; =Paraliaoningaspis)
• Monocheilus
• Monodechenella
• Monorakos
• Monosulcatina
• Mopanshania
• Moravocoryphe
• Morgatia
• Morocconites
  Morocconites
  Morocconites is an extinct genus of Trilobite in the order Phacopida found in the Atlas mountain range, Morocco.-External links:* *...
  
  
• Morosa
• Moschoglossis
• Moxomia

Mu

• Muchattellina
• Mucronaspis (=Guaykinites)
• Mufushania
• Mukrania
• Mulciberaspis
• Mummaspis
  Mummaspis
  Mummaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Mundocephalina
  Mundocephalina
  Mundocephalina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Mungyongia
• Munija

My

• Myinda
• Myindella
• Myoproetus
• Myopsolenus (=Collyrolenus)
• Myopsostrenua
• Myrmecomimus
• Mystrocephala
  Mystrocephala
  Mystrocephala is a genus of moths of the Noctuidae family.-References:*...
  
  
• Mytocephala (=Mirops)
• Myttonia
  Myttonia
  Myttonia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  

N

:

Na

• Nadiyella
• Nagaproetus
• Nahannagnostus
• Nahannia
• Nahannicephalus
• Namanoia
• Nambeetella
  Nambeetella
  Nambeetella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Namiolenoides
• Namuraspis
• Namuropyge (=Coignouina)
• Nandanaspis
• Nangaocephalus
• Nangaoia
• Nangaops
• Nanillaenus
• Nankinolithus
• Nannopeltis
• Nanoqia
• Nanshanaspis
• Nanshihmenia
• Naraoia
  Naraoia
  Naraoia is a genus of trilobites found in Cambrian strata of the Burgess Shale and the Maotianshan shales Lagerstätte. They were flattened, oval-shaped animals, with an uncalcified shield that was divided into two regions, a smaller region covering the head, and a larger section covering the...
  
  
• Narinosa
• Nasocephalus
• Nassovia
• Natalina
  Natalina
  Natalina is a genus of medium-sized predatory air-breathing land snails, carnivorous terrestrial pulmonate gastropod molluscs in the family Rhytididae.-Species:Species within the genus Natalina include:...
  
   (=Limbadiscus)
• Natmus
• Naustia

Ne

• Nebidella
  Nebidella
  Nebidella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Nehanniaspis
  Nehanniaspis
  Nehanniaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Neilsoniella
• Neimonggolaspis
• Nelegeria
• Nelgakia
• Neltneria
  Neltneria
  Neltneria is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Neoacrocephalites
• Neoanomocarella
• Neoasaphus
  Neoasaphus
  Neoasaphus is a genus of trilobite from the Ordovician Period of Europe.-Sources:* The Great Ordovician Biodiversification Event by Barry D. Webby, Florentin Paris, Mary L. Droser, and Ian G. Percival...
  
   (=Trematophoris; =Multiasaphus; =Postasaphus; =Subasaphus)
• Neobigotina
• Neocalmonia
• Neocheiruroides
• Neochilonorria
• Neocobboldia (=Cobboldia; =Margodiscus)
• Neodamesella
• Neoglaphyraspis
• Neogriffithides (=Siciliproetus)
• Neohedinaspis
• Neokaskia
• Neokochina
• Neolenus
• Neolichas
• Neometacanthus
• Neoolenus
• Neopagetina (=Pagetina)
• Neoparabolina
• Neopeltis
• Neopoliellina
• Neoprobolium
• Neoprodamesella
• Neoproetus
• Neopsilocephalina
• Neoredlichia
• Neoredlichina
• Neoscutellum
• Neoshirakiella
• Neosolenopleurella
• Neotaenicephalus
• Nepea
• Nephranomma
• Nephranops
• Nephrolenellus
  Nephrolenellus
  Nephrolenellus is an extinct monophyletic genus of trilobite from the Superfamily Olenelloidea of the Order Redlichiida. It contains two fossil species: N. multinodus and N. geniculatus. All specimens are known from the Great Basin of California, Nevada, and Arizona with one specimen from Canada...
  
  
• Nericella
• Nericia
• Nericiaspis
• Nerudaspis
• Neseuretinus
• Neseuretus (=Synhomalonotus)
• Nevadella
  Nevadella
  Nevadella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Nevadia
  Nevadia
  Nevadia is a genus of trilobites of the family Nevadiidae....
  
  
• Nganasanella (=Tamaranella)

Ni

• Nicoljarvius
• Nidanshania
• Nieszkowskia
• Nilegna
• Nileoides
• Nileus (=Remopleuridioides)
• Ninadiscus
  Ninadiscus
  Ninadiscus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Ninaspis
• Ningkianites
• Ningkianolithus
  Ningkianolithus
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
   (=Ceratolithus; =Hexianolithus)
• Ninglangia
• Ningnanaspis
• Ningqiangaspis
  Ningqiangaspis
  Ningqiangaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Ningxiaspis
• Niobe
  Niobe
  Niobe was a daughter of Tantalus and of either Dione, the most frequently cited, or of Eurythemista or Euryanassa, and she was the sister of Pelops and Broteas, all of whom figure in Greek mythology....
  
  
• Niobella (=Metoptogyrus)
• Niobides
• Niobina
• Nipponarges
• Nipponaspis
• Nipponocalymene
• Nitidocare
• Niuchangella

No

• Nobiliasaphus (=Pamirotchechites)
• Nodiceps
  Nodiceps
  Nodiceps is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Nodiphillipsia
• Noelaspis
• Nomadinis
  Nomadinis
  Nomadinis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Norasaphites
• Norasaphus
• Nordia
  Nordia
  Nordia is a moshav shitufi in central Israel. Located in the Sharon plain near Netanya and the HaSharon Junction, it falls under the jurisdiction of Lev HaSharon Regional Council. In 2007 it had a population of 2,100....
  
  
• Norinia
• Norwoodella
• Norwoodia
  Norwoodia
  Norwoodia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
   (=Whitfieldina)
• Notaiella
• Notoaphelaspis
• Notocoryphe
• Notopeltis
• Novakella (=Incisopyge)
• Novaspis
• Novoagnostus
• Novoameura

O

:

Oc

• Octillaenus
• Octobronteus (=Stoermeraspis; =Stoermeria)
• Oculeus
  Oculeus
  Oculeus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Oculichasmops

Oe

• Oedicybele (=Dindymenella; =Jemtella)
• Oedorhachis
• Oehlertaspis (=Oehlertia)
• Oelandiops
• Oenonella
  Oenonella
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  

Og

• Ogmasaphus
• Ogyginus
  Ogyginus
  Ogyginus is an extinct genus of Asaphida trilobite that lived during the Ordovician period. Commonly found in Wales.-External links:*...
  
  
• Ogygiocarella
• Ogygiocaris
• Ogygitella
• Ogygites
• Ogygitoides
• Ogygopsis
  Ogygopsis
  Ogygopsis is a genus of trilobite from the Cambrian of Antarctica and North America, specifically the Burgess Shale. It is the most common fossil in the Mt. Stephen fossil beds there, but rare in other Cambrian faunas...
  
   (=Taxioura)

Oi

• Oidalagnostus (=Ovalagnostus)
• Oidalaproetus
• Oinochoe
• Oirotella

Ol

• Olegaspis
• Olekmanellus
• Olekmaspis
  Olekmaspis
  Olekmaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Olenaspella
• Olenekella
• Olenekina
• Olenelloides
  Olenelloides
  Olenelloides is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Olenellus
  Olenellus
  Olenellus is a genus of trilobite that lived during the Early Cambrian. It is commonly found in areas of Europe and North America...
  
   (=Barrandia)
• Olenoides
  Olenoides
  Olenoides was a trilobite from the Cambrian period. Its fossils are found well-preserved in the Burgess Shale in Canada. It grew up to 10 cm long....
  
  
• Olentella
• Olenus (=Simulolenus)
• Olgaspis
  Olgaspis
  Olgaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Oligometopus (=Bernicella)
• Olimus
• Olinaspis

On

• Onaraspis
• Oncagnostus
  Oncagnostus
  Oncagnostus is a genus of trilobite in the order Agnostida, which existed in what is now Shandong, China. It was described by Whitehouse in 1936, and the type species is Oncagnostus hoi, which was originally described as a species of Agnostus by Sun in 1924....
  
   (=Eurudagnostus)
• Onchocephalina
• Onchocephalites
• Onchocephalus (=Litocodia)
• Onchometopus
• Onchonotellus (=Onchonotina; =Guotangia; =Seletella)
• Onchonotopsis
• Onchonotus
• Onchopeltis
• Onnia
• Onnicalymene
• Ontoella
• Onychopyge (=Prionopyge)
• Onycopyge
• Onymagnostus (=Agnostonymus)

Op

• Opipeuterella (=Ompheter; =Opipeuter)
• Opoa
• Opsidiscus (=Aulacodiscus)
• Opsiosoryctocephalus

Or

• Orbitoproetus
• Ordosaspis
• Ordosia
  Ordosia
  Ordosia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Oreadella
• Orienturus
• Orkekeia
• Orlovia
• Orloviella
• Ormathops
• Ormistonaspis
• Ormistonia
• Ormistoniella
• Ornamentaspis
• Orodes
• Orometopus
• Orphanaspis
• Orthodorsum
• Oryctocara
• Oryctocephalina
• Oryctocephalites
• Oryctocephaloides
• Oryctocephalops
• Oryctocephalus
  Oryctocephalus
  Oryctocephalus is a genus of trilobite known from the Middle Cambrian Burgess Shale. This small- to medium-sized trilobite's major characteristics are prominent eye ridges, pleural spines, long genal spines, spines on the pygidium, and notably four furrows connecting pairs of pits on its glabella...
  
   (=Vinakainella)
• Oryctometopus
• Orygmaspis
• Orygmatos

Ot

• Otarion (=Aulacopleurella; =Conoparia; =Otarionella)
• Otarionides
• Otarozoum
• Otodechenella
• Ottenbyaspis
• Ottoaspis

Ov

• Ovalocephalus (=Hammatocnemis; =Paratzuchiatocnemis)
• Ovatoryctocara

P

:

Pa

• Pachyaspidella
• Pachyaspis
• Pachycranium
• Pachyredlichia
  Pachyredlichia
  Pachyredlichia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Paciphacops
  Paciphacops
  Paciphacops is a genus of trilobites from the order Phacopida, suborder Phacopina. This genus is easily mistaken for the more common and popular genus Phacops and Kainops. It takes a careful eye to spot the difference. One major differences between Paciphacops and Phacops is that the glabella on...
  
  
• Pacootella
• Paedeumias
• Paenebeltella
• Pagetia
  Pagetia
  Pagetia is a genus of trilobites known from the Middle Cambrian Burgess Shale. Its remains are sometimes found in the otherwise-empty tubes of the polychaete worm Selkirkia. Its major characteristics are a small size of less than one centimeter, eyes, two thoracic segments, an annulated pygidium,...
  
   (=Eopagetia; =Mesopagetia)
• Pagetides (=Discomesites)
• Pagodia
• Pagodioides
• Pagometopus
• Paivinia
• Palacorona
• Paladin
  Paladin
  The paladins, sometimes known as the Twelve Peers, were the foremost warriors of Charlemagne's court, according to the literary cycle known as the Matter of France. They first appear in the early chansons de geste such as The Song of Roland, where they represent Christian martial valor against the...
  
   (=Weberides)
• Palaeadotes (=Pseudobergeronites)
• Palaeoharpes
• Palaeolenella
  Palaeolenella
  Palaeolenella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Palaeolenides
• Palaeolenus
  Palaeolenus
  Palaeolenus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Paleonelsonia (=Nelsonia)
• Palaeophillipsia
• Palella
• Palemansuyia
• Paleodechenella
• Paleofossus
  Paleofossus
  Paleofossus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Paleonelsonia
• Paleooryctocephalus
• Palmeraspis
• Palmettaspis
• Palpebralia
• Palpebrops
• Palquiella
• Panacus
• Panarchaeogonus
• Pandaspinapyga
• Panderia (=Rhodope)
• Panibole (=Proliobole)
• Panxinella
• Paofeniellus
• Paokannia
  Paokannia
  Paokannia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Papillicalymene
• Papyriaspis
  Papyriaspis
  Papyriaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Paraacidaspis
• Paraantagmus
• Paraaojia
• Parabailiella
• Parabarrandia
• Parabellefontia
• Parabolina (=Odontopyge)
• Parabolinella
• Parabolinina
• Parabolinites
• Parabolinoides (=Bernia)
• Parabouleia
• Parabriscoia
• Parabulbaspis
• Parabumastides
• Paracalmonia (=Proboloides)
• Paracalvinella
• Paracalymene
• Paracalymenemene (=Paracalymene)
• Paracedaria (=Pilgrimia)
• Paraceraurus
• Parachangaspis
• Parachangshania
• Parachaunoproetus
• Paracheiruroides
• Parachittidilla (=Amurticephalus)
• Paracoosia
  Paracoosia
  Paracoosia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
   (=Manchurocephalus)
• Paracrocephalites (=Arctaspis)
• Paracryphaeus
• Paracybantyx
• Paracybeloides
• Paradamesella (=Falkopingia)
• Paradechenella
• Paradictyites
• Paradionide
• Paradoxides
  Paradoxides
  Paradoxides was a genus of relatively large trilobites found throughout the world during the Mid Cambrian period ....
  
   (=Vinicella)
• Paraencrinurus
• Paraenshia
• Paraeosoptychoparia
• Paraerbia
• Paraeremiproetus
• Parafallotaspis
• Parafrithjofia
• Paragangdeeria
• Paraglobusia
• Paragraulos
• Paragriffithides
• Paragunnia
• Paraharpides
• Parahawleia
• Parahomalonotus
• Parahousia
• Parahuainania
• Parahystricurus
• Paraichangia
• Parainouyia
• Parajialaopsis
• Parakailia
• Parakaolishania
• Parakoldinia
• Parakoldinioidia (=Macroculites; =Missisquoia; =Rhamphopyge; =Tangshanaspis)
• Parakomaspis
• Parakotuia
• Paralardeuxia
• Paralbertella
• Paraleiolichas
• Paraleiostegium
• Paralejurus
  Paralejurus
  Paralejurus is a genus of trilobite from the Late Silurian to the Middle Devonian of Africa and Europe.-Sources:* Fossils by David Ward * in the Paleobiology Database...
  
  
• Paralepidoproetus
• Paralevisia
• Paralisaniella
• Paralorenzangella (=Paralorenzella)
• Paralorenzella
• Paramaladioidella
• Paramalungia
  Paramalungia
  Paramalungia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Paramansuyella (=Paramansuyia)
• Paramapania
• Paramecephalus (=Parahiolites)
• Paramegalaspis (=Dolerasaphus)
• Paramegistaspis (=Varvaspis)
• Paramenocephalites (=Solenoparina)
• Paramenomonia
• Paramgaspis
• Paramicmacca
• Paramicroparia
• Paramirabole
• Parampyx
• Paranevadella
  Paranevadella
  Paranevadella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Parangustibole
• Paranileus
• Paranomocare
• Paranomocarella
• Paranorwoodia
• Paraojia
• Paraolenoides
• Paraolenus
• Paraonychopyge
• Paraorlovia
  Paraorlovia
  Paraorlovia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Parapachyaspis
• Parapagetia
  Parapagetia
  Parapagetia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
   (=Planodiscus)
• Parapalpebralia
• Parapaokannia
  Parapaokannia
  Parapaokannia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Parapeishania
• Paraperiomma
• Paraphelaspis
• Paraphillipsia
• Paraphillipsinella (=Phillipsella; =Protophillipsinella)
• Paraphorocephala
• Parapilekia
• Paraplagiura
• Paraplesiagraulos
• Paraplethopeltis
• Paraplicatolina
• Parapliomera
• Parapoliella
• Paraporilorenzella
• Parapoulsenia
• Paraproetus
• Paraprotolenella
• Paraptychopyge
  Paraptychopyge
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Paraqingshuiheella (=Qingshuiheella)
• Pararaia (=Proichangia; =Tannuolaspis)
• Parasajanaspis
• Parashantungia
• Parashengia
• Parashuiyuella
• Parashumardia
• Parasolenoparia
• Parasolopleurena (=Parasolenopleura)
• Parasphaerexochus (=Mayopyge)
• Paraszechuanella
• Paratamdaspis
• Paratiresias
• Paratretaspis
• Paratrinucleus
• Parawarburgella
• Parawuania
• Parawutingaspis
• Paraxenocephalus
• Parayabeia
• Parayiliangella
• Parayinites
  Parayinites
  Parayinites is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Parayoungia (=Ichiyamella)
• Parayuepingia
• Parazhenbaspis
  Parazhenbaspis
  Parazhenbaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Parazhongtiaoshanaspis
• Paraziboaspis
• Pardailhania
• Parehmania (=Mcnairia; =Rowia; =Thompsonaspis)
• Pareops
  Pareops
  Pareops is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Pareuloma (=Gansucephalina)
• Parevenkaspis
• Parillaenus
• Parisoceraurus
• Parkaspis
• Parkesolithus
• Particeps
• Parvidumus
• Parvigena
• Paryfenus (=Colymbus)
• Patalolaspis
• Pateraspis
• Patomaspis
• Patronaspis
• Pauciella
• Pauliceps

Pe

• Peachella
• Pearylandia
• Peculicephalina
• Pedinaspis
• Pedinocephalina
• Pedinocephalites
• Pedinocephalus
• Pedinocoryphe
• Pedinodechenella
• Pedinopariops
• Pegelina
• Peichiashania
• Peishania
• Peishanoides
• Pelicephalus
• Pelitlina
• Pelmanaspis
  Pelmanaspis
  Pelmanaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Peltabellia (=Biolgina)
• Peltocare
• Peltura (=Anthes; =Anopocare)
• Pelturina
• Pemphigaspis
  Pemphigaspis
  Pemphigaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
   (=Hallaspis)
• Penarosa
  Penarosa
  Penarosa is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
   (=Trinepea)
• Penchiopsis
• Pennaia
• Pensacola
  Pensacola
  Pensacola is a city in the western part of the U.S. state of Florida.Pensacola may also refer to:* Pensacola people, a group of Native Americans* A number of places in the Florida:** Pensacola Bay** Pensacola Regional Airport...
  
  
• Peracheilus (=Acheilus)
• Perakaspis
• Peraspis
• Peratagnostus (=Monaxagnostus)
• Peregrinaspis
• Perexigupyge
• Perforina
• Periallaspis
• Pericopyge
• Perimetopus
• Periomma
• Periommella
• Perirehaedulus
• Perischoclonus
• Perischodory
• Perissopliomera
• Perissopyge
• Perliproetus
• Perneraspis (=Perneria)
• Peronopsella
• Peronopsis
  Peronopsis
  Peronopsis is a genus of trilobite from the Cambrian. Its remains have been found in Asia, Australia, Europe, and North America.Peronopsis is represented by the following species in the Wheeler Shale of Utah: P. bidens, P. fallax, P. gaspensis, P. intermedius, P. interstrictus , P. montis, and P....
  
   (=Mesagnostus; =Euagnostus; =Acadagnostus; =Axagnostus; =Itagnostus)
• Perrector (=Rawops)
• Perryus
• Perthiellus
• Perunaspis (=Nitidulopyge)
• Pesaia
• Pesaiella
• Pesaiina
• Petalocephalus
• Petigurus
• Petrbokia
• Petruninaspis

Ph

• Phacopidella (=Glockeria)
• Phacopidina
• Phacopina
  Phacopina
  Phacopina is a suborder including many trilobites.-External links:* - various photos, some of Phacopina...
  
  
• Phacops
  Phacops
  Phacops is a genus of trilobite in the order Phacopida, family Phacopidae that lived in Europe and North American in the Silurian and Devonian periods. It was a rounded animal, with a globosa head and large eyes, and probably fed on detritus...
  
  
• Phaetonellus
• Phalacroma
  Phalacroma
  Phalacroma is a genus of trilobite in the order Agnostida, which existed in what is now the Czech Republic. It was described by Hawle and Corda in 1867, and the type species is Phalacroma bibullatus, which was originally described as a species of Battus by Barrande in 1846....
  
   (=Platagnostus)
• Phalagnostus
  Phalagnostus
  Phalagnostus is a genus of trilobite in the order Agnostida, which existed in what is now the Czech Republic. It was described by Howell in 1955, and the type species is Phalagnostus nudus, which was originally described as a species of Battus by Beyrich in 1845....
  
   (=Phalacromina)
• Phalangocephalus
• Phaldagnostus
• Phanoptes (=Eccaparadoxides; =Macrocerca)
• Pharostomina (=Colpocoryphoides)
• Phaseolops
• Phillibole
• Phillibolina
• Philliboloides (=Phillibolina)
• Phillipsia
• Phillipsinella
• Philonyx
• Phoidagnostus
• Phoreotropis
• Phorocephala (=Carrickia)
• Phylacops
• Phylacterus (=Liostracinoides)
• Phyllaspis
• Phymaspis
• Physemataspis

Pi

• Pianaspis
• Piazella
• Pichunia
• Pichyklen
• Pichynturia
• Pileaspis
• Pilekia
• Piliolites
• Pilletina
• Piltonia
• Pinctus
• Pingluaspis
• Pingluia
• Pingquania (=Oxygonaspis)
• Piochaspis
• Pionaspis
• Piriforma
• Piriproetoides
• Piriproetus

Pl

• Placoparia
• Placoparina
• Plaesiacomia
• Plagiolaria
• Plagiura (=Ruichengella; =Plagiurella)
• Plakhinella
• Planaspis
  Planaspis
  Planaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Planilobus
• Planiscutellum (=Protoscutellum)
• Planocephalus
• Planokaskia
• Planolimbus
• Plasiaspis
• Platillaenus
• Platyantyx
• Platycalymene (=Sulcocalymene)
• Platycoryphe (=Liangshanaspis)
• Platydiamesus
• Platylichas (=Lingucephalichas)
• Platylisania
• Platypeltoides (=Platypeltis)
• Platyptychopyge
• Platysaukia
• Platyscutellum
• Plebiellus
• Plectasaphus
• Plecteuloma
• Plectrella
• Plectrifer
• Plectrocrania
• Plesiagraulos
• Plesiamecephalus
• Plesigangdeeria
• Plesiocilia
• Plesioconvexa
• Plesioinouyella
• Plesiomalvinella
• Plesionevadia
• Plesioparabolina
• Plesioperiomma
• Plesiowensus
• Plesiowuania
• Plesisolenoparia
• Plesiyuepingia
• Plethopeltella
• Plethopeltides
• Plethopeltis (=Plethometopus; =Enontioura)
• Plethopeltoides (=Kulyumbopeltis)
• Pleuroctenium (=Dichagnostus)
• Plicatolina
• Plicatolinella
• Pliomera (=Amphion)
• Pliomerella
• Pliomerellus
• Pliomeridius
• Pliomerina (=Pliomeraspis)
• Pliomeroides
• Pliomerops
• Plurinodus
• Plutonides (=Plutonia)

Po

• Podoliproetus
• Podowrinella
• Pogrebovites
• Pokrovskayaspis
• Pokrovskiella
• Poletaevella
  Poletaevella
  Poletaevella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Poletaevia
• Poliella (=Bornemannia)
• Poliellaspidella
• Poliellaspis
  Poliellaspis
  Poliellaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately . This faunal stage was part of the Cambrian Period....
  
  
• Poliellina
  Poliellina
  Poliellina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately . This faunal stage was part of the Cambrian Period....
  
  
• Politicurus
• Politinella
• Polliaxis
  Polliaxis
  Polliaxis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Polyariella
• Polycyrtaspis
• Polydinotes
• Polypleuraspis
• Pompeckia
• Pontipalpebralia
• Popigaia
• Popovkiaspis
• Popovkites
• Poriagraulos
• Porilorenzella (=Jinnania)
• Poriplethopeltis
• Poronileus
• Poroscutellum
• Portentosus
• Porterfieldia
• Portlockia
• Poshania
• Postfallotaspis
• Poulsenella
• Poulsenia
  Poulsenia
  Poulsenia is a monotypic genus of plants in the family Moraceae, native to rainforests from Mexico south through Venezuela to Bolivia. The only species is P. armata. Unlike any other Neotropical Moraceae, the leaves and twigs of Poulsenia are covered in small prickles...
  
  
• Poulseniella

Pr

• Pradesia
• Pradoella
• Praecoparia
• Praedechenella
• Praepatokephalus
• Pragolithus
• Pragoproetus
• Prantlia (=Malvernocare)
• Pratungusella
• Prehousia
• Preodontochile
• Presbynileus (=Paranileus)
• Prestalia
• Pribylia
• Priceaspis
  Priceaspis
  Priceaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
   (=Fitzroyaspis)
• Pricyclopyge (=Bicyclopyge)
• Primaspis
• Primoriella
• Princetonella (=Calyptomma)
• Prionocheilus (=Pharostoma)
• Prionopeltis (=Phaetonides; =Phaeton)
• Proagnostus (=Agnostascus; =Paragnostascus)
• Proampyx
• Proapatokephaloides
• Proapatokephalops
• Proasaphiscina
• Proasaphiscus
• Proasaphus
• Proavus
• Probilacunaspis
• Probolichas
• Probolops
• Probowmania
• Probowmaniella (=Proshantungaspis)
• Probowmanops
• Proceratocephala (=Drummuckaspis)
• Proceratopyge
• Prochuangia
• Prodalmanitina
• Prodamesella (=Metaprodamesella; =Neoprodamesella)
• Prodiacoryphe
• Prodikelocephalites
• Prodontochile
• Prodrevermannia
• Proehmaniella
• Proerbia
• Proetides
• Proetina
• Proetocephalus
• Proetopeltis
• Proetus
  Proetus
  Proetus was a mythical king of Argos and Tiryns. His father Abas, son of the last surviving and died Danaid Hypermnestra, had ruled over Argos and married Ocalea. However, Proetus quarreled continually with his twin brother Acrisius, inventing shields or bucklers in the process...
  
   (=Euproetus; =Aeonia; =Devonoproetus; =Falcatoproetus; =Forbesia; =Scotoproetus; =Trigonaspis)
• Profallotaspis
  Profallotaspis
  Profallotaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Prohedinaspis
• Prohedinella
• Prohedinia
  Prohedinia
  Prohedinia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
   (=Tosotychia)
• Proinouyia
• Prokootenia
  Prokootenia
  Prokootenia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Prokops
• Proliaoningaspis
• Proliostracus
• Prolloydia
• Prolonchocephalus
• Promacropyge (=Aksapyge)
• Promegalaspides
• Promeitania
• Prometeoraspis
• Prophysemataspis
• Proricephalus
• Proromma
• Prosaukia (=Stenosaukia)
• Proscharyia
• Prosocephalus
• Prosopiscus
• Prospectatrix
• Prostrix
• Prosymphysurus
• Protacanthina
• Protagraulos
  Protagraulos
  Protagraulos is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Protaitzehoia
• Protaldonaia
• Protarchaeogonus
• Protemnites (=Prismenaspis)
• Proteuloma (=Mioeuloma)
• Protobronteus
• Protocalymene
• Protocerauroides
• Protochittidilla
• Protocyphaspides
• Protoencrinurella
• Protohedinia
• Protoincaia
• Protolenella
  Protolenella
  Protolenella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Protolenoides
• Protolenus (=Bergeronia; =Matthewlenus)
• Protolloydolithus
  Protolloydolithus
  Protolloydolithus is a blind Trinucleid trilobite found in Ordovician rocks in Gilwern Hill, Powys, Wales.-Features of Trinucleid Trilobites:-References:* The World Encyclopedia of Fossils& Fossil-Collecting, Steve Parker*...
  
  
• Protopeltura
• Protopliomerella
• Protopliomerops (=Stototropis)
• Protopresbynileus (=Pseudonileus)
• Protoptychopyge
• Protoryctocephalus
• Protostygina
• Protrachoparia
• Protypus (=Bicaspis)
• Prouktaspis
  Prouktaspis
  Prouktaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Proveedoria
• Proxiniobe
• Prozacanthoides
• Pruvostina
  Pruvostina
  Pruvostina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Pruvostinoides
  Pruvostinoides
  Pruvostinoides is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  

Ps

• Psalaspis
• Psalikilopsis
• Psalikilus
• Pscemiaspis
• Psephosthenaspis (=Aponileus; =Ludvigsenella)
• Pseudacrocephalaspina
• Pseudagnostus (=Litagnostus; =Plethagnostus; =Pseudagnostina; =Rhaptagnostus; =Sulcatagnostus; =Xestagnostus)
• Pseudamphoton
• Pseudampyxina
• Pseudanomocarina
• Pseudaphelaspis
• Pseudatops
  Pseudatops
  Pseudatops is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Pseudeugonocare
• Pseudichangia
  Pseudichangia
  Pseudichangia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
   (=Zhuxiella; =Sematiscus; =Strenax)
• Pseudinouyia
• Pseudoacrocephalites
• Pseudoasaphinus
• Pseudoasaphoides
• Pseudoasaphus
• Pseudoasiatella
• Pseudobasilicoides
• Pseudobasilicus
• Pseudobasiliella
• Pseudobasiloides
• Pseudoblackwelderia
• Pseudobollandia
• Pseudocalvinella
• Pseudocalymene (=Eucalymene)
• Pseudocheirurus
• Pseudoclelandia
• Pseudocobboldia
• Pseudocrepicephalus
• Pseudocryphaeus
• Pseudocybele
• Pseudocyrtosymbole
• Pseudodechenella (=Arcticormistonia)
• Pseudodipharus
• Pseudodudu
• Pseudoeobronteus
• Pseudoerbia
  Pseudoerbia
  Pseudoerbia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Pseudoerbiopsis
• Pseudoeteraspis
• Pseudogerastos
• Pseudoglyptagnostus (=Glyptagnostotes)
• Pseudogriphasaphus
• Pseudogygites
  Pseudogygites
  Pseudogygites is an extinct genus of the class Trilobita from the Middle and Upper Ordovician.-Dimensions:Pseudogygites can reach in length and in width.-Description:...
  
  
• Pseudohysterolenus
• Pseudohystricurus
• Pseudojudomia
  Pseudojudomia
  Pseudojudomia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Pseudokadyella
  Pseudokadyella
  Pseudokadyella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Pseudokainella (=Elkanaspis; =Parakainella; =Fatocephalus)
• Pseudokingstonia
• Pseudokoldinella
• Pseudokoldinia
• Pseudokoldinioidia
• Pseudoleiostegium
• Pseudolenus
• Pseudolevinia
• Pseudoliostracina (=Emmrichella; =Liaoyangaspis)
• Pseudoliostracus
• Pseudolorenzella
• Pseudomaladioides
• Pseudomapania
• Pseudomegalaspis
• Pseudomera
• Pseudomexicella
• Pseudonericella
• Pseudoolenoides
• Pseudopaokannia
• Pseudopetigurus
• Pseudophalacroma
• Pseudophillipsia
• Pseudoplesiagraulos
• Pseudopliomera
• Pseudoproetus
• Pseudoprotolenella
• Pseudoptychopyge
• Pseudoptyocephalus
• Pseudoredlichia
  Pseudoredlichia
  Pseudoredlichia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Pseudoresserops
  Pseudoresserops
  Pseudoresserops is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Pseudorhaptagnostus (=Neoagnostus; =Euplethagnostus; =Hyperagnostus; =Tarayagnostus; =Calagnostus)
• Pseudosalteria
• Pseudosaratogia
• Pseudosarkia
• Pseudosaukia
• Pseudosaukianda
  Pseudosaukianda
  Pseudosaukianda is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Pseudosilesiops
• Pseudosolenoparia
• Pseudosolenopleura
• Pseudospatulina
• Pseudosphaerexochus (=Zethus)
• Pseudostygina
• Pseudotaishania
• Pseudotaitzuia
• Pseudotalbotina
• Pseudotrinodus
• Pseudotupolichas (=Arctinuroides)
• Pseudowaribole
• Pseudowentsuia
• Pseudowutingaspis
• Pseudoyiliangella
• Pseudoyuepingia (=Iwayaspis; =Sayramaspis)
• Pseudozacanthopsis
• Psilacella
• Psilocara
  Psilocara
  Psilocara is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Psilocephalina
• Psilocephalinella (=Psilocephalus; =Psilocephalina; =Borthaspis)
• Psilocephalops
• Psilostracus
• Psychopyge

Pt

• Ptarmigania
• Ptarmiganoides
• Pterocephalia (=Pterocephalus; =Hederacauda)
• Pterocephalina
• Pterocephalops
• Pterocephalopsinus (=Pterocephalops)
• Pterocoryphe
• Pteroparia
• Pteroredlichia (=Spinoredlichia)
• Pterygometopus
• Ptilillaenus
• Ptychagnostus
  Ptychagnostus
  Ptychagnostus is an extinct genus of blind trilobite that lived during the Cambrian period, part of the order Agnostida. Ptychagnostidae generally do not exceed ten millimetres in length. Their remains are sometimes found in the otherwise empty tubes of the polychaete worm Selkirkia. It probably...
  
   (=Acidusus?)
• Ptychaspis (=Asioptychaspis)
• Ptychometopus
• Ptychoparella (=Eoptychoparia; =Syspacephalus; =Elrathina)
• Ptychoparia (=Agraulopsis; =Ptychoparioides)
• Ptychoparopsis
  Ptychoparopsis
  Ptychoparopsis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
   (=Berabichia)
• Ptychopleurites (=Ptychopleura; =Aposolenopleura; =Punctularia)
• Ptychopyge
• Ptyctolorenzella
• Ptyocephalus (=Kirkella)

Pu

• Puanella
• Puanocephalus
• Pudoproetus (=Zhifangia)
• Pugilator
• Pugionicauda
• Pulcherproetus
• Pulchricapitus (=Reaganaspis)
• Pulvillaspis
• Pumilina
• Punctaspis
• Punillaspis
• Punka
• Pusillabole

Q

:

Qi

• Qiandongaspis
• Qiannanagraulos
• Qiaodiella
  Qiaodiella
  Qiaodiella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Qiaotingaspis
  Qiaotingaspis
  Qiaotingaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Qiaotouaspis
• Qijiangia
• Qilianaspis
• Qilianshania
• Qingkouia
  Qingkouia
  Qingkouia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
   (=Paradrepanuroides)
• Qingshuiheia
• Qingshuihella
• Qingzhenaspis
• Qinlingia

Qu

• Quadrahomagnostus
  Quadrahomagnostus
  Quadrahomagnostus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Quadratapyge
• Quadratillaenus
• Quadratispina
• Quadratoproetus
• Quadrops
• Quandraspis
• Quebecaspis
• Querandinia
• Quinquecosta
• Quitacetra
  Quitacetra
  Quitacetra is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Quitalia
  Quitalia
  Quitalia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Quyuania

R

:

Ra

• Raaschellina
• Rabienops
• Rabuloproetus
• Rabutina
• Radiaspis (=Xanionurus; =Charybdaspis)
• Radiolichas (=Diplolichas; =Septidenta)
• Radiopyge
• Radioscutellum
• Radiurus
• Radnoria
• Raduginella
• Raerinproetus
• Rananasus
  Rananasus
  Rananasus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Randaynia
• Randicephalus
• Ranunculoproetus
• Raphioampyx
• Raphiophorus
• Raragnostus
• Rasettaspis
• Rasettia (=Platycolpus)
• Ratinkaspis
• Rawlinsella
  Rawlinsella
  Rawlinsella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Raymondaspis (=Warburgella)
• Raymondella (=Reedaspis)
• Raymondina (=Raymondia)
• Raymondites

Re

• Reacalymene
• Realaspis
• Rectifrontinella
• Redlichaspis (=Lisaniella)
• Redlichia
  Redlichia
  Redlichia is a genus of trilobite of the Redlichiidae family, from the lower Cambrian period. Their fossils are found chiefly in Australia....
  
   (=Hoeferia; =Mesodema; =Dongshania)
• Redlichina
• Redlichops
• Reediella
• Reedocalymene
• Reedolithus
• Reedops
• Reedus
• Regina
  Regina
  Regina is a Late Latin feminine name meaning "queen" from the Latin, Italian and Romanian word meaning the same.-Given name:*Regina , 8th century French concubine of Charlemagne*Regina , Slovenian singer...
  
  
• Regius
• Reillopleura
• Remacutanger
• Remizites
• Remopleurella
• Remopleurides
  Remopleurides
  Remopleurides is an extinct genus of trilobite.-External links:* at the Paleobiology Database...
  
  
• Remopleuridiella
• Rencunia
• Renhuaia
• Renniella
• Repinaella
• Repinaspis
• Reraspis
• Resimopsis
  Resimopsis
  Resimopsis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Resseraspis
• Resseria
• Resserops
  Resserops
  Resserops is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Retamaspis
• Reubenella
• Reuscholithus
• Reussiana

Rh

• Rhadinopleura
• Rhaxeros (=Rhax)
• Rheicops
• Rhenocynproetus
• Rhenogriffides
• Rhenops
• Rhinoferus (=Lawiaspis; =Ropschiaspis)
• Rhinophacops
• Rhinoreedops
• Rhodonaspis
  Rhodonaspis
  Rhodonaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Rhombampyx
• Rhyssometopus

Ri

• Richardsonaspis
• Richardsonella (=Lakella; =Protapatokephalus)
• Richterarges
• Richteraspis
• Richterella
• Richterops (=Marsaisia)
• Rimouskia
  Rimouskia
  Rimouskia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Rina
• Rinconaspis
• Rinconia
  Rinconia
  Rinconia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Rinella
• Ritella

Ro

• Robergia
• Robergiella
• Robroyia
• Rogersvillia
• Roksaspis
• Rokycanocoryphe
• Rollia
• Rollmops
  Rollmops
  Rollmops are pickled herring fillets, rolled into a cylindrical shape around slices of onion, pickled gherkin, or green olive with pimento. Rollmops can be served held together with one or two small wooden skewers....
  
  
• Romanops
• Roncellia
• Rondocephalus
  Rondocephalus
  Rondocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Rongxiella
• Rontrippia
• Rorringtonia (=Analocaspis; =Chenaspis; =Trigonoproetus)
• Rosehillia
• Rossaspis
• Rossicurus
• Rostrifinis

Ru

• Ruegenometopus
• Rugulites (=Podolites)
• Ruichengaspis
• Runcinodiscus
  Runcinodiscus
  Runcinodiscus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Runnania

S

:

Sa

• Sacha
• Sachaspis
• Sagavia
• Sagitaspis
• Sagitoides
• Saharops
• Sailoma
• Sailycaspis
  Sailycaspis
  Sailycaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Saimachia
• Saimixiella
• Sajanaspis
  Sajanaspis
  Sajanaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Sakhaspidella
• Salankanaspis
• Saltaspis
• Salteria
• Salteria (=Errinys)
• Salterocoryphe
• Salterolithus (=Smeathenia)
• Sambremeuaspis
• Sanaschtykgolia
  Sanaschtykgolia
  Sanaschtykgolia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period.:)...
  
  
• Sanbernardaspis
• Sandoveria
• Sanduhedinaspis
• Sanduspis
• Sangzhiscutellum
• Sanhuangshania
• Sanidopyge
• Sanwania
• Sao (=Acanthocnemis; =Acanthogramma)
• Saonella
• Sapushania
  Sapushania
  Sapushania is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Sarassina
• Saratogia (=Idahoia; =Meeria)
• Sardaspis
• Sardoredlichia
• Sarkia
• Sarrabesia
• Saryaspis
• Saukia
• Saukianda
  Saukianda
  Saukianda is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Saukiella
• Saukioides (=Pseudosaukia; =Jeholaspis)

Sc

• Scabrella
• Scabriscutellum (=Dicranactis)
• Sceptaspis
• Schaderthalaspis
• Schagonaria
• Scharyia
• Schismagnostus
• Schistocephalus
• Schistometopus
• Schizophillipsia
• Schizoproetina
• Schizoproetoides
• Schizoproetus
• Schizostylus
• Schmalenseeia
• Schmidtaspis
• Schmidtiellus (=Schmidtia)
• Schmidtops
• Schoharia
• Schopfaspis
• Schoriecare
• Schoriella
  Schoriella
  Schoriella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Schoriina
• Schyilaspis
• Scinocephalus
• Scintilla
• Scopelochasmops
• Scotiella
• Scotoharpes (=Aristoharpes; =Selenoharpes)
• Sculptaspis
• Sculptella
• Sculptoproetus
• Scutellum (=Bronteus; =Brontes; =Goldfussia; =Brontes; =Goldius)

Se

• Sectigena
  Sectigena
  Sectigena is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Seisonia
• Sekwiaspis
  Sekwiaspis
  Sekwiaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Seleneceme (=Alsataspis)
• Selenopeltis
  Selenopeltis
  Selenopeltis is an extinct genus of trilobite from the Ordovician of Africa.- Sources :* http://www.fossilmuseum.net/Fossil_Galleries/TrilobitesMorocco/Selenopeltis-buchii/Selenopeltis-buchii.htm...
  
   (=Languedopeltis; =Polyeres)
• Selenopeltoides
• Seletoides
• Selindella
  Selindella
  Selindella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Semadiscus
  Semadiscus
  Semadiscus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Semagnostus
• Semicyclocephalus
  Semicyclocephalus
  Semicyclocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Semiproetus
• Semisphaerocephalus
• Septimopeltis
• Seriaspis
• Serrania
  Serrania
  Serrania is a Brazilian city in the state of Minas Gerais. As of 2009 census its population is estimated to be 7,584.The city has an area of 211,48 square kilometers. The population density is about 37/km2. The elevation is 895 meters....
  
  
• Serrodiscus (=Paradiscus)
• Sestrostega
• Severina
• Sevillia

Sh

• Shaanxia
  Shaanxia
  Shaanxia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Shabaella
  Shabaella
  Shabaella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Shahaspis
• Shanchengziella
• Shanganella
• Shanghaia
• Shanghaiaspis
• Shangsiaspis
• Shantungaspis
• Shantungia
• Shanxiella
• Shatania
  Shatania
  Shatania is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Shengia
• Shenjiawania
• Shergoldia
• Shergoldina
• Shickshockia
• Shidiania
• Shifangia
  Shifangia
  Shifangia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Shihuigouia
• Shilengshuia
• Shipaiella
  Shipaiella
  Shipaiella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Shiqihepsis
• Shirakiella
• Shitaia
• Shivelicus
  Shivelicus
  Shivelicus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Shuangshania
• Shuiyuella
• Shuizuia
• Shumardia
• Shumardoella (=Shumardella)
• Shumardops

Si

• Sibiriaspis
• Sibiriopleura
• Sichuanolenus
  Sichuanolenus
  Sichuanolenus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Sigmakainella
• Sigmocheilus
• Signatops
• Silesiops
• Siligerites
• Simaproetus
• Sinampyxina
• Sinespinaspis
• Sinijanella
  Sinijanella
  Sinijanella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately . This faunal stage was part of the Cambrian Period....
  
  
• Sinobathyurus
• Sinobole
• Sinocoosella
• Sinocrepicephalus
• Sinocybele
• Sinocyrtoproetus
• Sinodiscus
  Sinodiscus
  Sinodiscus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
   (=Tologoja)
• Sinoluia
• Sinopagetia
• Sinopaladin
• Sinoparapilekia
• Sinoproceratopyge
• Sinoproetus
• Sinoptychoparia
• Sinosaukia
• Sinoschistometopus
• Sinosymbole
• Sinskia
• Sivovella

Sk

• Skelipyx
• Skemmatocare
• Skemmatopyge
• Skljarella (=Proaraiopleura)
• Skreiaspis
• Skryjagnostus

So

• Sobovaspis
• Sohopleura
• Sokhretia
• Solariproetus
• Solenoparia
  Solenoparia
  Solenoparia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Solenoparops
• Solenopleura
• Solenopleurella
• Solenopleuropsis
• Solontzella
• Somatrikelon
• Sombrerella
  Sombrerella
  Sombrerella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Songkania
• Songtaoia
• Songxites
• Soomaspis

Sp

• Spathacalymene
• Spatulina
  Spatulina
  Spatulina is a genus of snipe fly of the family Rhagionidae. -Species:*S. engeli Szilády, 1942*S. sinensis Yang. Yang & Nagatomi, 1997...
  
  
• Spencella
• Spencia (=Stauroholcus)
• Spergenaspis
• Sphaeragnostus
• Sphaerexochus
  Sphaerexochus
  Sphaerexochus is a genus of trilobite from the Middle Ordovician to Late Silurian of Asia, Australia, Europe, and North America.-Sources:* Fossils by David Ward * in the Paleobiology Database...
  
   (=Korolevium; =Onukia; =Parvixochus)
• Sphaerocoryphe
  Sphaerocoryphe
  Sphaerocoryphe is a genus of trilobite that lived from the middle Ordovician to the Silurian. Its fossils have been found in Australia, Europe, and North America. Both Sphaerocoryphe and Hemisphaerocoryphe had a characteristically bulbous glabella, and the two may represent only one genus.-External...
  
   (=Ellipsocoryphe; =Hemisphaerocoryphe)
• Sphaerophthalmus
• Spinacephalus
• Spineuloma
• Spinibole
• Spinibolops
• Spinicryphops
• Spinillaenus
• Spinimetopus
• Spiniscutellum
• Spinoproetus
• Spirantyx
• Spizharaspis

St

• Stapeleyella
• Staurocephalus
• Stegnopsis
• Stelckaspis
• Stella
• Stenambon
• Stenelymus
• Stenoblepharum (=Viruanaspis)
• Stenochilina
• Stenopareia
• Stenopilus
• Stenorhachis
  Stenorhachis
  Stenorhachis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Stephanocare
• Stephenaspis
• Sternbergaspis
• Sthenarocalymene
• Stigmacephaloides
• Stigmacephalus
• Stigmadiscus
  Stigmadiscus
  Stigmadiscus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Stigmametopus
• Stigmaspis
• Stigmatoa
• Stiktocybele
• Stoecklinia
• Strenuaeva
  Strenuaeva
  Strenuaeva is a genus of Cambrian trilobite thought to show sexual dimorphism....
  
   (=Hindermeyeria)
• Strenuella
  Strenuella
  Strenuella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Strettonia
• Strictagnostus
• Strigambitus
• Strigigenalis
• Strotactinus
• Strotocephala
• Struszia
• Struveaspis
• Struveops
• Struveproetus
• Struveria
• Stubblefieldia
• Stummiana
• Stygina
• Styginella

Su

• Subeia
• Subitella
• Sudanomocarina
• Sujaraspis
• Sukhanaspis (=Kerbinella)
• Sulcocephalus
• Sulcubole
• Suludella
  Suludella
  Suludella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Suluktella
• Sunaspidella
• Sunaspis
• Sunina
• Sunwaptia
• Suriaspis
• Suribongia
• Suvorovaaspis
• Suyougouia

Sy

• Sycophantia
  Sycophantia
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Symphyroxochus
• Symphysops
• Symphysurina (=Symphysurinella; =Symphysuroides)
• Symphysurus
• Syndianella
  Syndianella
  Syndianella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Synphoria (=Eocorycephalus; =Neosynphoria)
• Synphoroides
• Syspacheilus
  Syspacheilus
  Syspacheilus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  

T

:

Ta

• Tabalqueia
• Tabatopygellina
  Tabatopygellina
  Tabatopygellina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Tadakoustia
  Tadakoustia
  Tadakoustia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Tadjikia
• Taemasaspis (=Gondwanaspis; =Snoderaspis)
• Taenicephalina
• Taenicephalites
• Taenicephalops
• Taenicephalus (=Bemaspis; =Maustonia)
• Taenora
• Tafilaltaspis
• Tagazella
• Tagenarella
• Taianocephalus
• Taiganella
• Taihangshania
• Taihungshania (=Miquelina)
• Taijiangia
• Taijiangocephalus
• Taimyraspis
• Taipakia
• Taishania
• Taitzehoia
• Taitzuia
  Taitzuia
  Taitzuia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Taitzuina
• Taklamakania (=Xinjiangia)
• Talacastops
• Talbotina
• Talbotinella
• Talus
• Tambakia
• Tamdaspis (=Psiloyuepingia)
• Tangbailaspis
• Tangjiaella
• Tangshihlingia
• Tangwangzhaia
• Taniaspidella
• Tankhella
• Tannudiscus
• Tanybregma
• Taoyuania (=Batyraspis)
• Tapinocalymene
• Tarijactinoides (=Bolivianaspis)
• Tarimella (=Yinganaspis)
• Tarricoia
• Tarynaspis
  Tarynaspis
  Tarynaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Tasmanaspis
• Tasmanocephalus
  Tasmanocephalus
  Tasmanocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Tatonaspis
• Tatulaspis
• Tavsenia
  Tavsenia
  Tavsenia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Tawstockia
• Taynaella

Tc

• Tchabdania
• Tchaiaspis.
• Tcherkesovia
• Tchernyshevioides
• Tchukeraspis
• Tchuostachia

Te

• Tegopelte
  Tegopelte
  Tegopelte is a genus of soft-bodied arthropod known from two specimens from the Walcott Quarry. Trackways that may have been produced by this organism or a close relative are known from the Kicking Horse Shale, stratigraphically below its body fossil occurrences....
  
  
• Teichertops
• Teinistion (=Dorypygella)
• Telaeomarrolithus
• Telephina (=Telephus)
• Telephops
• Teljanzella
• Tellerina
• Temnoura (=Asteromajia)
• Tengfengia
• Tenuipeltis
• Terataspis
• Teratokoptura
• Teratorhynchus
• Terechtaspis (=Nellina)
• Termieraspis
  Termieraspis
  Termieraspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Termierella
• Terranovella
  Terranovella
  Terranovella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Terranovia
• Tersella
• Tersiceps
• Tesselacauda
• Tetinia
• Tetraceroura
• Tetragonocephalus
• Tetrapsellium
• Tewonia

Th

• Thaiaspella
• Thaiaspis
• Thailandium
• Thalabaria
• Thaleops (=Hydrolaenus)
• Theamataspis
• Thebanaspis
• Thelecalymene
• Theodenisia (=Denisia Clark 1924 (non Hübner, 1825: preoccupied
  Denisia
  Denisia is a genus of the concealer moth family . Among these, it belongs to subfamily Oecophorinae. It was originally established as a subgenus of Borkhausenia.-Selected species:Species of Denisia include:...
  
  ); =Calculites; =Mannschreekia)
• Thigriffides
• Tholifrons (=Paraphoreotropsis)
• Tholus
  Tholus
  In planetary geology, tholus is the term used to describe a small domical mountain or hill. The word is from the Greek θόλος, which means a circular building with a conical or vaulted roof. The Romans transliterated the word into the Latin tholus, which means cupola or dome...
  
  
• Thomastus
• Thomondia
• Thoracocare
• Thoralaspis
• Thoralocolus
• Thulincola (=Pharostomaspis)
• Thuringaspis
• Thymurus
  Thymurus
  Thymurus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Thysanopeltella
• Thysanopeltis
  Thysanopeltis
  Thysanopeltis is a genus of trilobite that lived from the Early to the Middle Devonian. Its remains have been found in Africa and Europe.-Sources:*Trilobite: Eyewitness to Evolution, by Richard Fortey*Trilobites, by Riccardo Levi-Setti...
  
  
• Thysanopyge
  Thysanopyge
  Thysanopyge is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
   (=Basilicoides)

Ti

• Tianjingshania
• Tianshanocephalus
• Tiantouzhania
• Tibagya (=Schizopyge)
• Tibikephalus
• Tienshihfuia
• Tienzhuia
• Tilsleyia
• Timnaella
• Timoraspis
• Tinaspis
• Tingocephalus
• Tingyuania

To

• Toernquistia (=Paratoernquistia)
• Toernquistina
• Tolanaspis
• Tolbinella
• Toletanaspis
• Tolkienia
• Tollaspis
• Tolstotchichaspis
• Tomagnostella
• Tomagnostus
• Tongxinaspis
• Tonkinella
• Torgaschina
• Torifera
  Torifera
  Torifera is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Tormesiscus
• Torosus
• Tosacephalus
• Tostonia
• Townleyella
  Townleyella
  Townleyella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Toxochasmops
• Toxophacops
  Toxophacops
  Toxophacops is a genus of trilobites from the order Phacopida, family Phacopidae. Little is known about this genus because it was proposed in 2002. It is from the Devonian time period and is very small compared to other genera in the Phacopida family.Some Known Species and Locations.*Toxophacops...
  
  
• Toxotina
• Toxotis

Tr

• Trachoparia
• Trachycheilus
• Trachyostracus
• Tramoria
• Trapezocephalina
• Tretaspis
• Treveropyge
• Triadaspis
• Triangulaspis (=Acutaspis; =Angustaeva; =Plenudiscus; =Triangullina)
• Trianguraspis
• Triarthrella
• Triarthroides
• Triarthropsis
• Triarthrus
  Triarthrus
  Triarthrus is an Upper Ordovician trilobite found in New York, Ohio, Kentucky, and Indiana, eastern and northern Canada, and Scandinavia. It is the last of the Olenid trilobites, a group which flourished in the Cambrian period. T. eatoni have been found in the Beecher's Trilobite Bed, Rome, New...
  
   (=Brongniartia)
• Tricopelta
• Tricrepicephalus (=Paracrepicephalus)
• Trifonella
• Trigocephalus
• Trigoncekovia
• Trigonocerca
• Trigonocercella
  Trigonocercella
  Trigonocercella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago....
  
  
• Trigonyangaspis (=Trigonaspis)
• Trilobagnostus (=Rudagnostus)
• Trimerocephalus
  Trimerocephalus
  Trimerocephalus is a genus of trilobites from the order Phacopida, family Phacopidae. This genus is from the late Devonian and can be found in Morocco, Poland, Germany and occasionally in other European countries...
  
   (=Eutrimerocephalus)
• Trimerolichas
• Trimerus
• Trinia
  Trinia
  Trinia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Trinodus
• Trinucleoides
• Trinucleus (=Edgellia)
• Triplagnostus (=Huarpagnostus; =Solenagnostus; =Pentagnostus; =Aristarius; =Aotagnostus; =Acidusus?; =Canotagnostus; =Zeteagnostus)
• Triproetus
• Trisulcagnostus (=Tririmagnostus)
• Trochurus (=Corydocephalus; =Plusiarges; =Makromuktis)
• Troedssonia
• Tropiconiproetus
• Tropicoryphe
• Tropidocare
• Tropidocoryphe
• Tropidopyge
• Truncatometopus
• Trymataspis
• Trypaulites

Ts

• Tsaidamaspis
• Tschernyschewiella (=Schmidtia)
• Tsinania (=Dictyites)
• Tsunyidiscus
  Tsunyidiscus
  Tsunyidiscus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
   (=Mianxiandiscus; =Liangshandiscus; =Emeidiscus; =Hupeidiscus; =Shizhudiscus; =Guizhoudiscus)

Tu

• Tugurellum
• Tukalandaspis
• Tumicephalus
• Tumidulaspis
• Tumulina
• Tungtzuella
  Tungtzuella
  Tungtzuella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Tungusella
• Tuojiangella
• Turantyx
• Turcopyge
• Turgicephalus
• Turkestanella
• Tuvanella
  Tuvanella
  Tuvanella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
   (=Eleganolimba)
• Tuvanellus

Ty

• Tylotaitzuia
• Tylotaspis
• Tympanuella
• Typhlokorynetes
• Typhloniscus
• Typhloproetus

U

:

Ul

• Ulakhanella
• Ulania
  Ulania
  Ulania is an Union of Mehendiganj Upazila in the District and Division of Barisal, Bangladesh. Ulania is best known for its culture, tradition, education, sports etc. Some of well known Bengali writers, politicians came from this union. The well known Chowdhury family can be found in the centre of...
  
  
• Ullaspis
• Ulrichaspis
• Ulugtella

Ur

• Uralichas (=Bohemolichas; =Platopolichas)
• Uralops
• Uraloscutellum
• Urbanaspis
• Uriarra
• Uripes
• Urjungaspis
  Urjungaspis
  Urjungaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Uromystrum
• Ursinella

Us

• Ushbaspis
  Ushbaspis
  Ushbaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
   (=Metaredlichioides)
• Usoviana
• Usovinurus
• Usumunaspis

V

:

Va

• Valdaites
• Valdariops
• Valenagnostus
• Validaspis
  Validaspis
  Validaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Valongia
• Valtoressia
• Vandergrachtia
• Vanuxemella (=Vistoia)
• Varanella
  Varanella
  Varanella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Variopelta
  Variopelta
  Variopelta is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Varvia

Ve

• Vega
  Vega
  Vega is the brightest star in the constellation Lyra, the fifth brightest star in the night sky and the second brightest star in the northern celestial hemisphere, after Arcturus...
  
  
• Velieuxia
• Venosus
• Veragraulos
• Verditerrina
  Verditerrina
  Verditerrina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Verkholenella
• Vermontella
• Vernaculina

Vi

• Viaphacops
• Vica
  Vica
  Vića is a village in Centar municipality, in town of Sarajevo, Federation of Bosnia and Herzegovina, Bosnia and Herzegovina.-References:* Official results from the book: Ethnic composition of Bosnia-Herzegovina population, by municipalities and settlements, 1991. census, Zavod za statistiku Bosne...
  
  
• Vicinoproetus (=Vicinopeltis)
• Victorispina
• Vidria
• Vietnamia
• Vironiaspis
• Vittaella

Vo

• Vogdesia
• Vogesina
• Voigtaspis
• Vokovicia
• Volchovites
• Volkops
• Volocephalina
• Vologdinaspis
• Volonellus

W

:

Wa

• Waergangia
• Wafangdiania
• Wafangia
• Wagnerispina
• Waideggula
• Waigatchella
• Waisfeldaspis
• Walcottaspidella
• Walcottaspis
• Waldminia
• Walencrinuroides
• Wallacia
• Walliserops
  Walliserops
  Walliserops is a genus of spinose phacopid trilobite found in Lower to Middle Devonian age rocks from Morocco. All species of Walliserops share, and are famous for, the spectacular three-pronged "trident" that rises from the glabella...
  
  
• Wanbeiaspis
• Wandelella
  Wandelella
  Wandelella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago....
  
  
• Wangcunia
• Wangzishia
  Wangzishia
  Wangzishia is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period....
  
  
• Wanhuaia
• Wannania
• Wanneria
  Wanneria
  Wanneria is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Wanshania
• Wanwanaspis
• Wanwanoglobus
• Warburgaspis
• Warburgella (=Holometopus; =Owensella)
• Warendia
• Waribole
• Wayaonia

We

• Weania
• Weberiphillipsia (=Spinolimbella)
• Weberopeltis
• Wedekindiaspis (=Wedekindia)
• Weeksina
  Weeksina
  Weeksina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
  
  
• Weijiaspis
• Weishania
• Welleraspis (=Avonaspis)
• Wenganella
• Wengangaspis
• Wenganlenus
• Wentsuia
• Westergaardella
• Westergaardia (=Sphaerophthalmoides)
• Westergaardites
• Westonaspis
• Westropia
• Weyeraspis
• Weyerites
• Weymouthia

Wh

• Whittakerites
• Whittardolithus
• Whittingtonella
• Whittingtonia

Wi

• Wilbernia
• Wilcoxaspis
• Wilsonarella
• Winiskia
• Winterbergia
• Witryides
• Wittekindtia

Wu

• Wuanoides
• Wuchuanella
• Wudangia
• Wuhaina
• Wuhuia (=Deadwoodia)
• Wuhushania
• Wujiajiania
• Wutaishanaspis
• Wutaishania
• Wutingaspis
  Wutingaspis
  Wutingaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Wutingshania

X

:

Xe

• Xela
• Xenadoche
• Xenasaphus
• Xenoboloides
• Xenocheilos
• Xenocybe
• Xenocyclopyge
• Xenodechenella
• Xenoredlichia
• Xenostegium

Xi

• Xianfengia
• Xiangia
• Xiangqianaspis
• Xiangshanaspis
• Xiangshania
• Xiangzhongella
• Xiaodaositunia
• Xiaofangshangia
• Xiaomajiella
• Xiaoshiella
• Xichuania
• Xinanocephalus
• Xinglongia
• Xingrenaspis (=Spitella; =Danzhaina; =Wuxunaspis)
• Xingzishania
• Xinhuangaspis
• Xintaia
• Xiphogonium (=Trautensteinproetus)
• Xiuqiella
• Xiushanopsis
• Xiushuilithus
• Xiushuiproetus

Xy

• Xylabion
• Xyoeax
• Xystocrania (=Xialiangshania)
• Xystridura
  Xystridura
  Xystridura is a genus of trilobite from the middle Cambrian of Australia.-References:* Fossils by David Ward * in the Paleobiology Database...
  
   (=Milesia)

Y

:

Ya

• Yabeia
• Yangweizhouia
• Yanhaoia
• Yanquetruzia
• Yanshanaspis
• Yanshania
• Yanshanopyge
• Yantaiella
• Yanzhuangia
• Yaopuia
• Yaoyiayuella
• Yarmakaspis

Yi

• Yichangaspis
• Yilliangella (=Palaeoaspis)
• Yilliangellina
• Yinaspis
• Yingziaspis
• Yinites
  Yinites
  Yinites is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Yinjiangia
• Yinpanolithus
  Yinpanolithus
  is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago....
  
  
• Yinshanaspis
• Yishanaspis

Yo

• Yohoaspis
• Yokusenia
• Yongwolia
• Yorkella
  Yorkella
  Yorkella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Yosimuraspis (=Eoyosimuraspis; =Metayosimuraspis)
• Youngia
  Youngia
  Youngia is an Asiatic genus of Asteraceae. There are several weed species in the genus including the endangered Youngia nilgiriensis Babcock from Sispara and Youngia japonica, which is also known as Japanese Hawkweed....
  
  
• Yoyarria

Yu

• Yuehsienszella
• Yuepingioides
• Yujinia
• Yuknessaspis
• Yukonaspis
• Yukonia
• Yukonides
• Yumenaspis
• Yunlingia
• Yunmengshania
• Yunnanaspidella
  Yunnanaspidella
  Yunnanaspidella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Yunnanaspis
  Yunnanaspis
  Yunnanaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Yunnanocephalus
  Yunnanocephalus
  Yunnanocephalus is an extinct genus ptychopariid trilobite. It lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period. It was a "moderately common" member of the Chengjiang Fauna....
  
   (=Pseudoptychoparia)
• Yurakia
• Yushugouia

Z

:

Za

• Zacanthellina
• Zacanthoides
  Zacanthoides
  Zacanthoides is an extinct Cambrian genus of trilobite. It was a nektobenthic predatory carnivore. Its remains have been found in Canada , Greenland, Mexico, and the USA...
  
   (=Embolimus)
• Zacanthopsina
• Zacanthopsis
• Zacompsus
• Zaozhuangaspis
• Zaplaops
• Zazvorkaspis

Zh

• Zhaishania
• Zhanglouia
• Zhangshania
  Zhangshania
  Zhangshania is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
  
• Zhegangula
• Zhejiangoproetus
• Zhenania
• Zhenbaspis
  Zhenbaspis
  Zhenbaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period....
  
   (=Yankongia; =Zhenxiongaspis)
• Zhenganites (=Eosoptychopyge)
• Zhenpingaspis
• Zhongtiaoshanaspis
• Zhongweia
• Zhuangliella
• Zhuitunia
• Zhujia
• Zhusilengops