In the geologic timescale, the Bajocian is an age or stage in the Middle Jurassic

Middle Jurassic

The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from 176-161 million years ago. In European lithostratigraphy, rocks of this Middle Jurassic age are called the Dogger....

. It lasted from approximately 171.6 Ma to around 167.7 Ma (million years ago). The Bajocian age succeeds the Aalenian

Aalenian

The Aalenian is a subdivision of the Middle Jurassic epoch/series of the geologic timescale that extends from about 175.6 Ma to about 171.6 Ma . It was preceded by the Toarcian and succeeded by the Bajocian.-Stratigraphic definitions:...

 age and precedes the Bathonian

Bathonian

In the geologic timescale the Bathonian is an age or stage of the Middle Jurassic. It lasted from approximately 167.7 Ma to around 164.7 Ma...

 age.

Stratigraphic definitions

The Bajocian stage takes its name from the Latin

Latin

Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...

 name (Bajocae) of the town of Bayeux

Bayeux

Bayeux is a commune in the Calvados department in Normandy in northwestern France.Bayeux is the home of the Bayeux Tapestry, which depicts the events leading up to the Norman conquest of England.-Administration:Bayeux is a sub-prefecture of Calvados...

, in the region of Normandy

Normandy

Normandy is a geographical region corresponding to the former Duchy of Normandy. It is in France.The continental territory covers 30,627 km² and forms the preponderant part of Normandy and roughly 5% of the territory of France. It is divided for administrative purposes into two régions:...

 in France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

. The stage was named and introduced in scientific literature by French palaeontologist Alcide d'Orbigny

Alcide d'Orbigny

Alcide Charles Victor Marie Dessalines d'Orbigny was a French naturalist who made major contributions in many areas, including zoology , palaeontology, geology, archaeology and anthropology....

 in 1842.

The base of the Bajocian stage is defined as the place in the stratigraphic column where fossil

Fossil

Fossils are the preserved remains or traces of animals , plants, and other organisms from the remote past...

s of the ammonite

Ammonite

Ammonite, as a zoological or paleontological term, refers to any member of the Ammonoidea an extinct subclass within the Molluscan class Cephalopoda which are more closely related to living coleoids Ammonite, as a zoological or paleontological term, refers to any member of the Ammonoidea an extinct...

 genus

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...

 Hyperlioceras

Hyperlioceras

Hyperlioceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....

first appear. A global reference profile (a GSSP) for the base is located at Murtinheira, close to Cabo Mondego

Cabo Mondego

Cabo Mondego lie in the Portuguese maritime coast of the Atlantic Ocean. it is the westernmost point of the Serra da Boa Viagem, three kilometers north of Figueira da Foz....

 in Portugal

Portugal

Portugal , officially the Portuguese Republic is a country situated in southwestern Europe on the Iberian Peninsula. Portugal is the westernmost country of Europe, and is bordered by the Atlantic Ocean to the West and South and by Spain to the North and East. The Atlantic archipelagos of the...

. The top of the Bajocian (the base of the Bathonian) is at the first appearance of ammonite species Parkinsonia convergens.

Subdivision

The Bajocian is often divided into Lower/Early and Upper/Late subages or substages.

In the Tethys domain

Tethys Ocean

The Tethys Ocean was an ocean that existed between the continents of Gondwana and Laurasia during the Mesozoic era before the opening of the Indian Ocean.-Modern theory:...

, the Bajocian contains seven ammonite biozone

Biozone

Biostratigraphic units or Biozones are intervals of geological strata that are defined on the basis of their characteristic fossil taxa....

s:

• zone of Parkinsonia parkinsoni
• zone of Garantiana garantiana
  Garantiana
  Garantiana is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
  
  
• zone of Strenoceras niortense
• zone of Stephanoceras humphriesianum
  Stephanoceras
  Stephanoceras is a Stephanoceratacean genus and type for the Stephanoceratidae, which lived during the Bajocian but is now extinct....
  
  
• zone of Sonninia propinquans
• zone of Witchellia laeviuscula
• zone of Hyperlioceras discites
  Hyperlioceras
  Hyperlioceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
  
  

†Thalattosuchians

Thalattosuchians of the Bajocian
Taxa	Presence	Location	Description	Images
Metriorhynchus Metriorhynchus Metriorhynchus is an extinct genus of marine crocodyliform that lived in the oceans during the Middle to Late Jurassic. Metriorhynchus was named by the German palaeontologist Christian von Meyer in 1830. Metriorhynchus was a carnivore that spent much, if not all, its life out at sea...			An opportunistic carnivore Carnivore A carnivore meaning 'meat eater' is an organism that derives its energy and nutrient requirements from a diet consisting mainly or exclusively of animal tissue, whether through predation or scavenging...  that fed on fish Fish Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups... , belemnites and other marine animals and possible carrion. Metriorhynchus grew to an average adult length of 3 meters (9.6 feet), although some individuals may have reached lengths rivaling those of large nile crocodile Nile crocodile The Nile crocodile or Common crocodile is an African crocodile which is common in Somalia, Ethiopia, Uganda, Kenya, Egypt, Tanzania, Zambia, Zimbabwe, Gabon, South Africa, Malawi, Sudan, Botswana, and Cameroon... s.
Steneosaurus Steneosaurus Steneosaurus is an extinct genus of teleosaurid crocodyliform from the Early Jurassic to Early Cretaceous . Fossil specimens have been found in England, France, Germany, Switzerland and Morocco.-Species:...
Teleosaurus Teleosaurus Teleosaurus was an extinct genus of teleosaurid crocodyliform that lived during the Middle Jurassic. It was approximately in length. Teleosaurus had highly elongate jaws, similar to those of a modern gharial. It had a long, slender, body, with a sinuous tail that would have helped propel it...
Teleidosaurus Teleidosaurus Teleidosaurus is an extinct genus of carnivorous metriorhynchoid crocodyliform from Middle Jurassic deposits of Normandy, France...			The most plesiomorphic known metriorhynchid.

Dinosauria

Rhoetosaurus

Rhoetosaurus

Rhoetosaurus , named after Rhoetus, a titan in Greek Mythology, is a genus of sauropod dinosaur from the Jurassic of what is now eastern Australia. Rhoetosaurus is estimated to have been about 12–15 metres long...

, Ozraptor

Ozraptor

Ozraptor is an abelisauroid theropod dinosaur from the Middle Jurassic Colalura Sandstone of Australia.In 1967 a group of four twelve-year-old Scotch College schoolboys found a fossil at the Bringo Railway Cutting site near Geraldton, which they showed to Professor Rex Prider of the University of...

, Yunnanosaurus

Yunnanosaurus

Yunnanosaurus is a genus of prosauropod dinosaur from the Early to Middle Jurassic Period, a position in time that makes it one of the last prosauropods. It is closely related to Lufengosaurus...

, Cetiosauriscus

Cetiosauriscus

Cetiosauriscus is a genus of sauropod dinosaur. It was perhaps a diplodocid, a close relative of Diplodocus, and lived in the Callovian of England Cetiosauriscus (meaning "whale-lizard-like" i.e. "Cetiosaurus-like") is a genus of sauropod dinosaur. It was perhaps a diplodocid, a close relative of...

†Ammonitida

Ammonitids of the Bajocian
Taxa	Presence	Location	Description	Images
Alfeldites Alfeldites Alfeldites is an extinct genus of cephalopod belonging to the Ammonite subclass....	Confirmed.		The only known species in this Alaska Alaska Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait... n genus. Abbasites is believed to be ancestral to the ammonite family Otoitidae Otoitidae Otoidtidae: stephanoceratacean ammonitina from the early Middle Jurassic that begin as cadicones but become more planualte with age; derived from the Hammitoceratidae , probably through Erycites by way of Abbasites.... .
Apsorroceras Apsorroceras Apsorroceras is an extinct genus of cephalopod belonging to the Ammonite subclass....	Confirmed.
Asphinctites Asphinctites Asphinctites is an extinct genus of cephalopod belonging to the Ammonite subclass....	Confirmed.
Asthenoceras Asthenoceras Asthenoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....	Confirmed.
Bigotites Bigotites Bigotites is strongly ribbed, round-whorled perisphinctid ammonitic cephalopod from the middle Jurassic with a smooth band along the outer edge of the shell.-References:-------------------------------...	Confirmed.
Bradfordia Bradfordia Bradfordia is a moderately involute to involute genus included in the ammonoid cephalopod family Oppeliidae, coiled so that the outer whorl encloses most, or much, of the previous, but with a small umbilicus exposing inner whorls. The shell is compressed, whorl height much greater than width,...	Confirmed.
Cadomites Cadomites Cadomites is an extinct ammonite genus from the superfamily Stephanocerataceae that lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Cadomoceras Cadomoceras Cadomoceras is an extinct cephalopod genus from the order ammonitida that lived during the Bajocian Stage of the Middle Jurassic, approximately 178 to 175 million years ago....	Confirmed.
Caumontisphinctes Caumontisphinctes Caumontisphinctes is an ammonoid genus from the ammonitid superfamily Perkinsonataceae that lived during the Bajocian stage of the Middle Jurassic...	Confirmed.
Chondroceras Chondroceras Chondroceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Cleistosphinctes Cleistosphinctes Cleistosphinctes is an extinct cephalopod genus from the ammonite order that lived during the Middle Jurassic approximately 174 to 170 million years ago....	Confirmed.
Cranocephalites Cranocephalites Cranocephalites is a Middle Jurassic ammonitid genus named by Spath in 1932 and included in the family Cranoceratidae, superfamily Stephanoceratacea....	Confirmed.
Darellia Darellia Darellia is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Dimorphinites Dimorphinites Dimorphinites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Diplesioceras Diplesioceras Diplesioceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Docidoceras Docidoceras Docidoceras is an extinct ammonite genus from the order Ammonitida that lived during the Middle Jurassic in what is now Europe, North Africa, and Oregon. Docidoceras is included in the family Otoitidae which makes up part of the ammonite superfamily Stephanocerataceae.Docidoceras has a broad,finely...	Confirmed.
Dorsetensia Dorsetensia Dorsetensia is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Durotrigensia Durotrigensia Durotrigensia is a genus large to giant ammonites in the perisphinctoid family Parkinsoiniidae with sharply and finely ribbed inner whorls, smooth outer whorl, and without tubercles or lappets that lived during the Bajocian stage of the Middle Jurassic some 170 to 164 million years...	Confirmed.
Duashnoceras Duashnoceras Duashnoceras is an extinct ammonoid cephalopod genus included in the Stephanoceratidae that lived during the Bathonian stage of the Middle Jurassic...	Confirmed.
Emileia Emileia Emileia is an extinct genus from a well-known class of fossil cephalopods, the ammonites, that lived during the early part of the middle Jurassic.Emileiais a large form with fine ribbing that includes may secondaries...	Confirmed.
Eocephalites Eocephalites Eocephalites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Epistrenoceras Epistrenoceras Epistrenoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Ermoceras Ermoceras Ermoceras is a thomboceratid ammonite from the Middle Jurassic of central Arabia, Sinai, and Algeria with strong primary and secondary ribs and a single row of lateral tubercles; described as having a deep ventral groove...	Confirmed.
Euaptetoceras Euaptetoceras Euaptetoceras is an evolute hammatoceratid ammonite from the lower Middle Jurassic, included in the family Hammatoceratidae and the subfamility Hammatoceratinae. The genus may be a junior synonym for Eudmetoceras of Buckman, 1920....	Confirmed.
Eudmetoceras Eudmetoceras Eudmetoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Euhoploceras Euhoploceras Euhoploceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Fissilobiceras Fissilobiceras Fissilobiceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Fontannesia Fontannesia Fontannesia is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Frogdenites Frogdenites Frogdenites is an extinct ammonite genus from the order Ammonitida that lived during the Middle Jurassic in what is now Europe, Canada, and Tibet...	Confirmed.
Garantiana Garantiana Garantiana is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Guhsania Guhsania Guhsania is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Graphoceras Graphoceras Graphoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Haplopleuroceras Haplopleuroceras Haplopleuroceras is a Middle Jurassic ammonite and likely member of the Hildoceratacean family Sonniniidae with which it shares the same sort of ribbing....	Confirmed.
Hebetoxyites Hebetoxyites Hebetoxyites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Hlawiceras Hlawiceras Hlawiceras is an extinct genus from a well known subclass of fossil cephalopods known informally as ammonites that lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Hyperlioceras Hyperlioceras Hyperlioceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Kosmermoceras Kosmermoceras Kosmermoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Kumatostephanus Kumatostephanus Kumatostephanus is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago. It was slow moving and likely to fall victim to large pedators such as Liopleurodon, or small mosasaurs....	Confirmed.
Labyrinthoceras Labyrinthoceras Labyrinthoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Leptosphinctes Leptosphinctes Leptosphinctes is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Lissoceras Lissoceras Lissoceras is an involute, smooth or finely vetrolaterally ribbed, ammonite with a blunt, un-keeled venter, included in the Haploceratidae, that lived from the Lower Bajocian - Middle Oxfordian in what is now Europe, south Asia, and southern Alaska.Lissoceratoides, once considered to be a subgenus...	Confirmed.
Lupherites Lupherites Lupherites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Magharina Magharina Magharina is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Megasphaeroceras Megasphaeroceras Megasphaeroceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted approximately 200 to 145 million years ago....	Confirmed.
Metrolytoceras Metrolytoceras Metrolytoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Nannolytoceras Nannolytoceras Nannolytoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Newmarracarroceras Newmarracarroceras Newmarracarroceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Normannites Normannites Normannites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Oecoptychius Oecoptychius Oecoptychius is an extinct genus from a well known subclass of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Oecotraustes Oecotraustes Oecotraustes is an extinct genus from a well known subclass of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Okribites Okribites Okribites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Oppelia Oppelia Oppelia is a haploceratcean ammonite and type genus for the Oppeliidae that lived during the Middle Jurassic between 170 and 164 million years ago. Shells of Oppelia are involute with a small to moderate size umbilicus, bluntly rounded to sharp venter, and deeply impressed dorsum. Sides are...	Confirmed.
Orthogarantiana Orthogarantiana Orthogarantiana is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Otoites Otoites Otoites is the type genus of the ammonite family Otoitidae that live during the early part of the Middle Jurassic epoch.The Otoitidae, which is part of the superfamily Stephanocerataceae, are part of the well known subclass of prehistoric cephalopods known in general terms as ammonitesOtoites is...	Confirmed.
Oxycerites Oxycerites Oxycerites is an extinct ammonoid cephalopod belonging to the haploceratacean family, Oppeliidae, that lived during the middle of the Jurassic Period, between 164 and 160 million years ago...	Confirmed.
Padragosiceras Padragosiceras Padragosiceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Parastrenoceras Parastrenoceras Parastrenoceras is an extinct genus from the ammonoid cephalopod order Ammonitida, included in the family Spiroceratidae that lived during the Bajocian stage of the early Middle Jurassic....	Confirmed.
Parkinsonia Parkinsonia Parkinsonia , also Cercidium , is a genus of flowering plants in the pea family, Fabaceae. It contains about 12 species that are native to semi-desert regions of Africa and the Americas...	Confirmed.
Phaulostephanus Phaulostephanus Phaulostephanus is an extinct genus from the ammonoid family Stephanoceratidae, which is part of the ammonitid superfamily Stephanocerataceae, that lived during the early Middle Jurassic....	Confirmed.
Poecilomorphus Poecilomorphus Poecilomorphus is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Praebigotites Praebigotites Praebigotites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Praeparkinsonia Praeparkinsonia Praeparkinsonia is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Praestrigites Praestrigites Praestrigites is a genus from the Strigoceratidae which is included in the ammonitid superfamily, Haplocerataceae.Praestrigites comes from the lower Middle Jurassic and has been found in England, Germany, Switzerland, and Oregon....	Confirmed.
Procerites Procerites Procerites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Prorsisphinctes Prorsisphinctes Prorsisphinctes is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Protoecotrausites Protoecotrausites Protoecotrausites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Pseudogarantiana Pseudogarantiana Pseudogarantiana is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Pseudotoites Pseudotoites Pseudotoites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....	Confirmed.
Reynesella	Confirmed.
Shirbuirnia	Confirmed.
Siemiradzkia	Confirmed.
Skirroceras	Confirmed.
Skolekostephanus	Confirmed.
Sohlites	Confirmed.
Sonninia	Confirmed.
Sphaeroceras	Confirmed.
Spinammatoceras	Confirmed.
Spiroceras	Confirmed.
Stegoxyites	Confirmed.
Stemmatoceras	Confirmed.
Strenoceras	Confirmed.
Strigoceras	Confirmed.
Subcollina Subcollina Subcollina is an evolute to serpenticonic stephanoceratacean ammonite from the Middle Jurassic of Mexico, placed in the family Spiroceratidae....	Confirmed.
Telermoceras	Confirmed.
Teloceras	Confirmed.
Thamboceras	Confirmed.
Toxamblyites	Confirmed.
Toxolioceras	Confirmed.
Trilobiticeras	Confirmed.
Trimarginia	Confirmed.
Tugurites	Confirmed.
Vermisphinctes	Confirmed.
Witchellia	Confirmed.
Zemistephanus Zemistephanus Zemistephanus is an extinct genus of cephalopod belonging to the Ammonite subclass....	Confirmed.
Zurcheria Zurcheria Zurcheria is an extinct genus of cephalopod belonging to the Ammonite subclass....	Confirmed.

†Belemnites

Belemnites of the Bajocian
Taxa	Presence	Location	Description	Images
Belemnitina Belemnitina Belemnitina is a genus of belemnite, an extinct group of cephalopods....	Confirmed.
Hibolites Hibolites Hibolites is a genus of belemnite, an extinct group of cephalopods....	Confirmed.
Holcobelus Holcobelus Holcobelus is a genus of belemnite, an extinct group of cephalopods....	Confirmed.
Produvalia Produvalia Produvalia is a genus of belemnite, an extinct group of cephalopods....	Confirmed.
Sachsibelus Sachsibelus Sachsibelus is a genus of belemnite, an extinct group of cephalopods....	Confirmed.

Nautiloids

Nautiloids of the Bajocian
Taxa	Presence	Location	Description	Images
Ophionautilus Ophionautilus Ophionautilus is an extinct genus of prehistoric nautiloid. The nautiloids are a subclass of shelled cephalopods that were once diverse and numerous but are now represented by only a handful of species.-References:...	Confirmed.
Somalinautilus	Confirmed.

Literature

; 2004: A Geologic Time Scale 2004, Cambridge University Press

Cambridge University Press

Cambridge University Press is the publishing business of the University of Cambridge. Granted letters patent by Henry VIII in 1534, it is the world's oldest publishing house, and the second largest university press in the world...

.; 1842: Paléontologie française. 1. Terrains oolitiques ou jurassiques, 642 pp., Bertrand, Paris.; 1997: Definition of the Aalenian-Bajocian Stage boundary, Episodes, 20(1): pp 16–22.; 2002: A compendium of fossil marine animal genera (entry on cephalopoda), Bulletin of American Paleontology 364, p 560.

External links

• GeoWhen Database - Bajocian
• Jurassic-Cretaceous and Lower Jurassic timescales, at the website of the subcommission for stratigraphic information of the ICS
• Stratigraphic chart of the Upper Jurassic, at the website of Norges Network of offshore records of geology and stratigraphy