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Amphicyoninae is a subfamily of extinct bear-dogs, large terrestrial carnivores belonging to the suborder Caniformia and which inhabited North America, Eurasia, and Africa from ~37.2 - 2.6 Ma. Amphicyoninae existed for approximately ~ 34.6 millio ...



Paracynarctus is an extinct genus of the Borophaginae subfamily of canids native to North America. It lived from the Early Miocene to Middle Miocene 16.0 - 13.6 Ma, existing for approximately 2.4 million years. It was likely an omnivore, and lack ...



Synthetoceratinae is an extinct subfamily of Protoceratidae, deer-like herbivorous mammals belonging to the order Artiodactyla. They were endemic to North America during the Miocene epoch, living 23.03 - 3.9 Ma, existing for approximately 19.13 m ...



Synthetoceratini is an extinct tribe of the subfamily Synthetoceratinae within the family Protoceratidae belonging to the order Artiodactyla endemic to North America during the Miocene, living epoch 20.6 - 4.9 Ma, existing for approximately 15.7 ...


Gypsum Springs Formation

The Gypsum Springs Formation is a stratigraphical unit of Middle Jurassic age in the Williston Basin. It takes the name from gypsum springs in Wyoming, and was first described in outcrop in the County of Fremont J. D. Love in 1939.





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. Cadamoceras has smooth inner whorls, but the appearance has pleats cours ...





Cleistosphinctes is an extinct cephalopod genus from the ammonite order that lived during the Middle Jurassic. Cleistosphinctes named Arkell, 1953, and included in the family Perisphinctidae and Perisphinctaceae superfamily, small, compressed, ev ...



Dorsetensia is a narrowly coiled discoidal ammonite from the early Middle Jurassic, lower Bajocian, belonging to the family Sonniniidae of the superfamily Hildoceratoidea. The inner whorls are ribbed or smooth, outer whorl is smooth. The outer ri ...



Durotrigensia is a genus of ammonites in the perisphinctoid family Parkinsoniidae. Durotrigensia sometimes considered a subgenus of Parkinsonia and is applicable to Oraniceras and Okribites. These cephalopods lived on the Bajocian stage of the mi ...



Emileia is an extinct genus from a well-known class of fossil cephalopods, the ammonites, that lived during the early part of the Bajocian. Emileia is a large form with fine ribbing that includes may secondaries. It begins as a barrel cadicone, w ...





Ermoceras is a genus of ammonite belonging to the Thomboceratidae family of the Middle Jurassic found in deposites of central Arabia, Sinai, and Algeria with strong primary and secondary ribs and a single row of lateral tubercles, described as ha ...



Fissilobiceras is a smooth, compressed, involute ammonite from the lower Middle Jurassic of Europe, named by Buchman in 1919. It is assigned to the hildoceratoid family, Hammatoceratidae. Fissilobiceras is similar to Shirbuirnia, except, primaril ...



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. Hlawiceras belongs to the family St ...



Magharina small upper Bajocian genus of ammonite with a small smooth involute shell having a single keel along the venter and extremely simple sutures. Found in Egypt. The type species is M. magharensis.



Phaulostephanus is an extinct genus from the ammonoid family Stephanoceratidae, which is part of the ammonitid superfamily Stephanoceratoidea, that lived during the early Middle Jurassic. Phaulostephanus small serptenticone generally subcircular ...










Jinju Formation

The Jinju Formation is a Mesozoic geologic formation in South Korea. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.


Wessex Formation

The Wessex Formation is a fossil-rich English geological formation that dates from the Berriasian to Barremian stages of the Early Cretaceous. It forms part of the Wealden Group and underlies the younger Vectis Formation and overlies the Durlston ...


Amorina (genus)

Amorina is genus of ammonite from the Upper Hauterivian, zone of Pseudothurmannia angulicostata to Lower Barremian zone of Coronites darsi. It has probably evolved from Megacrioceratinae and gave rise to genus Mascarellina.



Annuloceras is an extinct genus of ammonite cephalopod. Its fossils are found in Lower Barremian sediments from California. The genus is currently placed in the family Aegocrioceratidae. Annuloceras is an expanded Ammonite is similar in shape to ...



Astieridiscus is an extinct lower Cretaceous ammonite. Its shell evolute, covered by dense, simple or branching, slightly flexuous ribs. The sides are slightly flattened, the venter rounded. No umbilical or other tubercles except on innermost who ...


Caulkicephalus trimicrodon


Istiodactylus latidens



Kabylites is a narrow, straight shelled Lower Cretaceous ancyloceratid resembling Bochianites in general form. Kabylites differs from Bochianites in having an umbilical lobe more or less the same size as the first lateral lobe. In Bochianites the ...



Lytocrioceras is a genus of ancyloceratine ammonites from the Lower Cretaceous with a shell that resembles a safety pin. The shell begins as a loosely wound spiral, followed by a straight shaft which makes a U-turn to go back is somewhat the oppo ...



Megacrioceratinae is an extinct ammonoid cephalopod subfamily. It has been described as family Megacrioceratidae in 2006, but later changed into subfamily under its current name. Ammonites belonging to this subfamily lived from Plesiospitidiscus ...


Forest Marble Formation

The Forest Marble is a geological formation in England. Part of the Great Oolite Group, it dates to back to the late Bathonian stage of the Middle Jurassic.


Patcham Formation

The Patcham Formation is a Mesozoic geologic formation of Patcham Island, India. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.



Arctocephalites is an extinct ammonitic cephalopod genus from the Middle Jurassic with a wide northern distribution belonging to the stephanoceratacean family, Cardioceratidae. Inner momentum shell Arctocephalites sharply ribbed, but changes dram ...


Rhamphocephalus bucklandi



Zigzagiceras is an extinct cephalopod genus belonging to the order Ammonoidea, that lived during the upper Bathonian stage of the Middle Jurassic. They were fast-moving nektonic carnivores.



Argentiniceras is an extinct genus of cephalopod belonging to the Ammonite subclass. It belongs to the class Cephalopoda. Its fossils were found in Russia, Yemen, India, Mediterranean, Canada and South America.


Ctenochasma roemeri


Gnathosaurus macrurus


Plataleorhynchus streptorophorodon



Ectopocynus is an extinct genus of bone crushing canid which inhabited North America from the Oligocene to the Early Miocene. It lived from 33.3 - 16.0 Ma and existed for approximately 17.3 million years. The remains of Ectopocynus are limited to ...



Nanotragulus is an extinct genus of hypertragulid ruminant found in North America, Europe, and Asia. It lived from the Middle Eocene to the Early Miocene, living 46.2–20.4 Ma, existing for approximately 26 million years. Fossils have been found f ...



Palaeogale is an extinct genus of carnivorous mammal known from the Late Eocene, Oligocene, and Early Miocene of North America, Europe, and Eastern Asia. A small carnivore often associated with the mustelids, Palaeogale might have been similar to ...


Parahippus leonensis

Parahippus leonensis is an extinct proto-horse of the family Equidae that was endemic to North America during the Miocene from 23.030 - 16.3 Ma living for approximately 6.73 million years. Parahippus leonensis was named for Leon or more specifica ...



Diplogastridae, formerly Diplogasteridae, are a family of nematodes known from a wide range of habitats, often in commensal or parasitic associations with insects.



Palaeomeryx is an extinct genus of Artiodactyla, of the family Palaeomerycidae, endemic to Europe and Asia from the Miocene epoch, 16.9 – 7.25 Ma, existing for approximately 9.65 million years.



Protepicyon is an extinct monospecific genus of the Borophaginae subfamily of canids native to North America. It lived during the Barstovian stage of the Middle Miocene 16.0 - 13.6 mya. One of the top predators of its time, it was the probable an ...



Psalidocyon is an extinct genus of the Borophaginae subfamily of canids native to North America. It lived during the Early to Middle Miocene 20.6 - 13.6 Ma, existing for about 7 mya. Only one species is currently recognised. It was initially foun ...



Pseudarctos is a member of the extinct family Amphicyonidae of terrestrial carnivores belonging to the suborder Caniformia, which inhabited Eurasia in the Middle Miocene subepoch 16.9 - 11.1 Ma, existing for approximately 5.8 million years. Pseud ...

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