†family Seymouriidae Williston 1911
Osteichthyes - Seymouriamorpha - Seymouriidae
Alternative spelling: Seymouridae
Parent taxon: Seymourioidea according to V. V. Bulanov 2003
See also Carroll 1988, Carroll et al. 1972, Case 1911, Hay 1930, Kuhn 1946, Lewis and Vaughn 1965, Martens et al. 2005 and Vaughn 1966
Sister taxa: Discosauridae, Karpinskiosauridae
Subtaxa: Rhinosauriscus Seymouria
Distribution:
• Permian of Canada (1: Prince Edward Island collection), Germany (1), United States (16: Colorado, New Mexico, Oklahoma, Texas, Utah)
Total: 18 collections including 19 occurrences