Amphibia - Temnospondyli - Trematopidae
Alternative spelling: Trematopsidae
Synonym: Achelomidae Watson 1919
Full reference: S. W. Williston. 1910. Cacops, Desmospondylus; new genera of Permian vertebrates. Geological Society America Bulletin 21:249-284
Parent taxon: Olsoniformes according to R. R. Schoch and A. R. Milner 2014
See also Anderson et al. 2008, Bourget and Anderson 2011, Carroll 1988, Kuhn 1946, Martens et al. 2005, Olson 1941, Polley and Reisz 2011, Schoch 2013, Sumida et al. 1998, Watson 1919 and Yates and Warren 2000
Sister taxon: Dissorophidae
Subtaxa: Acheloma Actiobates Anconastes Ecolsonia Fedexia Mordex Phonerpeton Rotaryus Tambachia
Type: Trematops
Distribution:
• Permian of Germany (1 collection), United States (11: New Mexico, Oklahoma, Texas)
• Carboniferous of the Czech Republic (1), United States (3: Kansas, New Mexico, Pennsylvania)
Total: 16 collections including 20 occurrences