Osteichthyes - Recumbirostra - Gymnarthridae
Full reference: E. C. Case. 1910. New or little known reptiles and amphibians from the Permian (?) of Texas. Bulletin of the American Museum of Natural History 28:163-181
Parent taxon: Recumbirostra according to J. D. Pardo et al. 2017
See also Carroll 1988, Carroll et al. 1998, Carroll and Gaskill 1978, Case 1910, Daly 1973, Hay 1930, Huttenlocker et al. 2013, Olson 1970, Olson and Barghusen 1962 and Thayer 1985
Sister taxa: Aletrimyti, Brachystelechidae, Dvellecanus, Huskerpeton, Joermungandr, Lysorophia, Molgophidae, Ostodolepidae, Pantylidae, Proxilodon, Steenerpeton
Subtaxa: Bolterpeton Cardiocephalus Elfridia Euryodus Goniorhynchus Hylerpeton Leiocephalikon Pariotichus Sparodus Stegotretus
Type: Gymnarthrus
Ecology:
Distribution:
• Permian of United States (15: Kansas, New Mexico, Oklahoma, Texas collections)
• Carboniferous of Canada (2: Nova Scotia), the Czech Republic (1), United States (1: Arizona)
Total: 19 collections including 26 occurrences