†superfamily Seymourioidea Tatarinov 1971 (tetrapod)
Osteichthyes - Seymouriamorpha
Parent taxon: Seymouriamorpha according to V. V. Bulanov 2003
See also Carroll et al. 1972
Sister taxa: Adenoderma, Chronisuchidae, Discosauriscidae, Kotlassidae, Kotlassioidea, Leptorophida, Promelanerpeton, Sauravidae, Waggonerida
Subtaxa: Discosauridae Karpinskiosauridae Seymouriidae
Type: Seymouriidae
Ecology:
Distribution:
• Rotliegendes of the Czech Republic (1 collection)
• Permian of the Czech Republic (7), France (2), Germany (2), the Russian Federation (19), United States (16: Colorado, New Mexico, Oklahoma, Texas, Utah)
Total: 47 collections including 53 occurrences