Cheiruridae
Encyclopedia
The family Cheiruridae was a family of phacopid trilobite
s of the suborder Cheirurina. Its members, as with other members of the suborder, had distinctive pygidia
modified into finger-like spines. They first appeared near the very beginning of the Ordovician
, and persisted until the Devonian
.
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...
s of the suborder Cheirurina. Its members, as with other members of the suborder, had distinctive pygidia
Pygidium
The pygidium is the posterior body part or shield of crustaceans and some other arthropods, such as insects and the extinct trilobites. It contains the anus and, in females, the ovipositor...
modified into finger-like spines. They first appeared near the very beginning of the Ordovician
Ordovician
The Ordovician is a geologic period and system, the second of six of the Paleozoic Era, and covers the time between 488.3±1.7 to 443.7±1.5 million years ago . It follows the Cambrian Period and is followed by the Silurian Period...
, and persisted until the Devonian
Devonian
The Devonian is a geologic period and system of the Paleozoic Era spanning from the end of the Silurian Period, about 416.0 ± 2.8 Mya , to the beginning of the Carboniferous Period, about 359.2 ± 2.5 Mya...
.
Genera
- Acanthoparypha
- Actinopeltis
- Anasobella
- Ancyginaspis
- Apollonaspis
- Arcticeraurinella
- AleiaAreia (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
- Azyptyx
- Barrandeopeltis
- BorealaspisBorealaspisBorealaspis is an extinct genus of Trilobite. It contains two species, B. biformis, and B. whittakerensis.-External links:* at the Paleobiology Database...
- Bornholmaspis
- BufoceraurusBufoceraurusBufoceraurus is an extinct genus of Cheirurid trilobite found in the Ordovician Trenton Group limestones of central Ontario, Canada.-External links:* at the Paleobiology Database...
- Ceraurinella
- Ceraurinium
- CeraurinusCeraurinusCeraurinus is an extinct genus of trilobite in the order Phacopida. It contains one species, C. serratus.-External links:* at the Paleobiology Database...
- Cerauromeros
- Cerauropeltis
- CeraurusCeraurusCeraurus 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...
- CheirurusCheirurusCheirurus 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...
- Chiozoon
- Contracheirurus
- Courtessolium
- Crotalocephalides
- CrotalocephalinaCrotalocephalinaCrotalocephalina is an extinct genus of trilobite in the order Phacopida found in Morocco.-External links:** at the Paleobiology Database...
- CrotalocephalusCrotalocephalusCrotalocephalus 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...
- Ceraurinella
- Cybelloides
- CyrtometopusCyrtometopusCyrtometopus is an extinct genus of trilobite in the order Phacopida. It contains one species, C. meridianus.-External links:* at the Paleobiology Database...
- DeiphonDeiphonDeiphon 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...
- Didrepanon
- EccoptochileEccoptochileEccoptochile is an extinct genus of trilobite in the order Phacopida. It contains one species, E. clavigera.-External links:* at the Paleobiology Database...
- Eccoptochiloides
- Forteyops
- Foulonia
- Gabriceraurus
- Geracephalina
- HadromerosHadromerosHadromeros is an extinct genus of trilobite in the order Phacopida. It contains one species, H. elongatus.-External links:* at the Paleobiology Database...
- Hammannopyge
- Hapsiceraurus
- HeliomeraHeliomeraHeliomera 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
- HoliaHoliaHolia 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...
- Hyrokybe
- Junggarella
- KawinaKawinaKawina is an extinct genus of trilobite in the order Phacopida. It contains one species, K. wilsoni.-External links:* at the Paleobiology Database...
- KolymellaKolymellais 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....
- Krattaspis
- KtenouraKtenouraKtenoura is a genus of trilobite from the Silurian of Europe.-Sources:* Fossils by David Ward * in the Paleobiology Database...
- Laneites
- Lehua
- Leviceraurus
- Nieszkowskia
- Onycopyge
- Osekaspis
- Pandaspinapyga
- Paraceraurus
- Parasphaerexochus
- Parayoungia
- Parisoceraurus
- Pateraspis
- Patomaspis
- Placoparina
- Pompeckia
- Proromma
- Protocerauroides
- Pseudocheirurus
- Pseudosphaerexochus
- Radiurus
- Ratinkaspis
- Reraspis
- Skelipyx
- SphaerexochusSphaerexochusSphaerexochus 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...
- SphaerocorypheSphaerocorypheSphaerocoryphe 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...
- Stubblefieldia
- SycophantiaSycophantiais 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....
- Turantyx
- Valongia
- Whittakerites
- Xylabion
- Xystocrania
- Youngia
- Zazvorkaspis