Bajocian
Encyclopedia
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

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