†family Trimerorhachidae Cope 1882
Amphibia - Temnospondyli - Trimerorhachidae
Alternative spelling: Trimerorachidae
Parent taxon: Dvinosauria according to R. R. Schoch and A. R. Milner 2014
See also Carroll 1988, Daly 1973, Hay 1902, Kuhn 1946, Watson 1919 and Yates and Warren 2000
Sister taxa: Dawsonerpeton, Dvinosauroidea, Erpetosaurus, Eugyrinus, Laidleriidae, Neldasaurus, Saurerpetontidae, Timonya, Trimerorhachoidea, Trypanognathus
Subtaxa: Lafonius Nannospondylus Procuhy Trimerorhachis
Distribution:
• Permian of Brazil (1 collection), United States (56: Nebraska, New Mexico, Oklahoma, Texas)
• Carboniferous of United States (4: Kansas, New Mexico)
Total: 61 collections including 65 occurrences