Cheirolepis is an extinct genus of marine and freshwater ray-finned fish that lived in the Devonian period of Europe and North America. It is the only genus yet known within the family Cheirolepididae and the order Cheirolepidiformes. It was among the most basal of the Devonian actinopterygians and is considered the first to possess the "standard" dermal cranial bones seen in later actinopterygians.
Chirodipterus is an extinct genus of marine lungfish which lived during the Devonian period. Fossils have been found worldwide, including Germany, China, eastern & western Australia, and the United States (Michigan). However, it has been suggested that the genus as currently defined is polyphyletic, in which case only the German type species would belong to the genus.
Conchodus is an extinct genus of marine lungfish which lived during the Devonian period.
Laugiidae is an extinct family of prehistoric marine coelacanths which lived during the Triassic and Jurassic periods. Their fossils have been found in Canada, Germany and Greenland.
Coelacanthopsis is an extinct genus of marine coelacanth which lived during the early Carboniferous (Mississippian). It is known from one species, C. curta from the Viséan of Ardross, Scotland.
Alloberyx is an extinct genus of prehistoric marine ray-finned fish, possibly a holocentrid, that lived during the Santonian of Lebanon, from the Sahel Alma site. It contains two species, A. syriacus, initially described as a species of Pseudoberyx, and A. robustus, initially classified in the genus Serratocentrus.
Chrysolepis is a genus of prehistoric marine lobe-finned fish that lived during the Late Devonian period. It contains a single species, C. orlensis, known from the middle Famennian of Oryol Oblast, Russia. It is the only member of the family Chrysolepididae, erected due to its highly distinct morphology unseen among other osteolepiforms. It may be the sister taxon to the eusthenopterids.
Acrolepis is an extinct genus of prehistoric marine bony fish that lived from the Famennian stage of the Devonian to the early Triassic epoch. Some species from the Early Triassic of Tasmania are also ascribed to Acrolepis.
Cryptobalistes is an extinct genus of triplespine that lived during the early Oligocene epoch. It contains a single species, C. brevis that inhabited the seas around what is now Canton Glarus, Switzerland. It is thought to be closely allied with another triplespine from Glarus, Acanthopleurus. Cryptobalistes, Acanthopleurus, and Protacanthodes are thought to be basal members of the Triacanthidae.
Chrotichthys is an extinct genus of prehistoric freshwater ray-finned fish that lived in the Anisian stage of the Middle Triassic epoch. It contains a single species, C. gregarius, known from the Terrigal Formation of New South Wales, Australia.
Gogodipterus is an extinct genus of prehistoric marine lungfish in the family Chirodipteridae. It contains a single species, G. paddyensis, known from the Late Devonian Gogo Formation of Western Australia. It was formerly placed in Chirodipterus.
Cryptolepis is an extinct genus of prehistoric marine lobe-finned fish known from the Late Devonian of what is now eastern Europe. It contains a single species, C. grossi from the middle to late Famennian of Oryol, Russia and Latvia. Scales of this species are particularly common in Devonian localities of Latvia. It was named after paleontologist Walter R. Gross.
Ascalabos is an extinct genus of marine ray-finned fish known from the Late Jurassic Solnhofen Limestone of Germany. It contains one species, A. voithii. Some authorities synonymize it with Leptolepis.
Athrodon is an extinct genus of marine pycnodontid fish that lived in shallow seas in what is now England, Germany, Spain and France from the Late Jurassic until the genus' extinction during the start of the late Cretaceous. The various species are very similar in splenial bone and tooth morphology to Mesodon. Otherwise, no articulated or complete specimen is known: all fossil specimens are bone fragments and disarticulated teeth. This genus is thought to be diagnosed by the presence of four lateral tooth rows. The presence of this genusin the Cretaceous is disputed, as the remains of Cretaceous species could belong to other genera.
Cyranorhis is an extinct genus of prehistoric marine ray-finned fish that lived during the Serpukhovian age of the Carboniferous period. One species is known, C. bergeraci in the Bear Gulch Limestone what is now Montana, United States. It is named after French novelist Cyrano de Bergerac.
Cycloptychius is an extinct genus of prehistoric freshwater & marine ray-finned fish that existed throughout much of the Carboniferous period in Eurasia, and possibly into the Early Permian in South Africa. It was a member of the Rhadinichthyidae, a family of basal ray-finned fish that was formerly placed in the now-paraphyletic order Palaeonisciformes.
Charleuxia is an extinct genus of prehistoric freshwater ray-finned fish that lived during the Asselian age in what is now Burgundy, France (Autun). It may possibly belong to the genus Paramblypterus.
Ceramurus is an extinct genus of prehistoric marine ray-finned fish from the Late Jurassic. It contains a single species, C. macrocephalus from the Purbeck Group of England.
Decazella is an extinct genus of prehistoric freshwater ray-finned fish that lived during the late Carboniferous period. It contains a single species, D. vetteri from the Gzhelian (Stephanian) age of what is now Occitania, France.
Ceratodontiformes is the only extant order of lungfish, containing the families Neoceratodontidae, Lepidosirenidae, and Protopteridae as well as many other extinct groups. Members of this group are the only lungfish known to have survived the Permian-Triassic extinction event. Although lungfish originated in marine environments, the Ceratodontiformes have been an exclusively freshwater group since the Carboniferous. This order was formerly considered the suborder Ceratodontoidei.
