| Ctenocephalichthys Temporal range: Santonian ~ | |
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| Genus: | Ctenocephalichthys |
| Binomial name | |
| Ctenocephalichthys Gaudant 1969 | |
Ctenocephalichthys is an extinct genus of prehistoric ray-finned fish that lived during the Santonian. [2]
Pseudoltinomys is a prehistoric rodent that lived approximately 30 million years ago, during the Oligocene epoch. It outwardly resembles a gerbil, but may have been related to kangaroo rats or may represent an early offshoot of rodents with no modern relatives.
Dartmuthia is an extinct genus of primitive jawless fish that lived in the Silurian period. Fossils of Dartmuthia have been found in Himmiste Quarry, on the island of Saaremaa in Estonia. It was first described by William Patten.
The Bear Gulch Limestone is a limestone-rich geological lens in central Montana, renowned for the quality of its late Mississippian-aged fossils. It is exposed over a number of outcrops northeast of the Big Snowy Mountains, and is often considered a component of the more widespread Heath Formation. The Bear Gulch Limestone reconstructs a diverse, though isolated, marine ecosystem which developed near the end of the Serpukhovian age. It is a lagerstätte, a particular type of rock unit with exceptional fossil preservation of both articulated skeletons and soft tissues. Bear Gulch fossils include a variety of fish, invertebrates, and algae occupying a number of different habitats within a preserved shallow bay.
Prosantorhinus is an extinct genus of rhinoceros from the lower and middle Miocene. The small teleoceratine rhinocerotid was found in western Europe and Asia.
Falcatus is an extinct genus of falcatid chondrichthyan which lived during the early Carboniferous Period in Bear Gulch bay in what is now Montana.
Youngolepis is a genus of prehistoric coelocanth which lived during the Early Devonian period. Fossils of Y. praecursor have been found in the Xitun Formation of China & the Bac Bun Formation of Trang Xa, Vietnam. Some additional fossil specimens from the Xishancun Formation of China have been referred to Youngolepis sp. & represent the oldest known occurrence of the genus. In addition, Y. praecursor is also found in the Xujiachong formation
Allenypterus is a genus of a prehistoric lobe-finned fish which lived during the Bashkirian stage of the Late Carboniferous period, 318 million years ago). Fossils have been discovered in Bear Gulch Limestone, Montana, USA.
Whiteiidae is an extinct family of prehistoric coelacanth fishes which lived during the Triassic period.
Cryptolepis is an extinct genus of prehistoric sarcopterygian or lobe-finned fish.
Lochmocercus is an extinct genus of prehistoric coelacanth fishes which lived during the Carboniferous Period.
Iranorhynchus is an extinct genus of prehistoric sarcopterygian or lobe-finned fish.
Metaceratodus is an extinct genus of prehistoric lungfish in the family Ceratodontidae, with an indeterminate specimen known from the Late Triassic (Norian)-aged Lissauer Breccia of Poland and more complete specimens known from the Late Cretaceous of Queensland, Australia and Argentina. The genus was named and described by Frederick Chapman in 1914.
Paraceratodus is an extinct genus of prehistoric lungfish. Only one species, P. germaini, is known from the latest Permian or earliest Triassic period of Madagascar. Phylogenetic evidence supports it being the most basal member of the suborder Ceratodontoidei, which contains modern lungfish, and as with the rest of the order it likely diverged during the late Carboniferous.
Tarachomylax is an extinct genus of prehistoric sarcopterygians or lobe-finned fish.
Platysiagum is an extinct genus of prehistoric bony fish belonging to the family Platysiagidae. Fossils are known from the Middle Triassic of China and Italy and the Early Jurassic of England.
Marsdenichthys is an extinct genus of Devonian tetrapodomorph. Fossils have been found from Mount Howitt in Victoria, Australia from strata that are Givetian-Frasnian in age. Mount Howitt is an important site that has been the source of many tetrapodomorph fossils, including Beelarongia and Howittichthys, both of which were first described from the locality.
Brachypotherium is an extinct genus of rhinoceros that lived in Eurasia and Africa during the Miocene. A first upper decidual molar referrable to Brachypotherium brachypus was found during gold mining in New Caledonia during the 19th century, being misidentified as a species of marsupial known as Zygomaturus. However, rhinoceros were never native to New Caledonia, and the tooth was probably used as jewelry by a French convict deported there.
Myllokunmingiidae is a group of very early, jawless prehistoric fish (Agnathans) which lived during the Cambrian period. The Myllokunmingiids are the earliest known group of craniates. The group contains three genera, Haikouichthys, Myllokunmingia, and Zhongjianichthys. Their fossils have been found only in the Maotianshan Shales lagerstätte.
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