†family Ophiacodontidae Nopsca 1923 (ophiacodont)

Osteichthyes - Synapsida - Ophiacodontidae

Synonyms: Clepsydropidae Cope 1878, Clepsydropsidae Cope 1878, Poliosauridae Case 1907

Parent taxon: Eupelycosauria according to R. R. Reisz 1986

See also Carroll 1988, Case 1907, Case 1910, Cope 1878, Gardiner 1982, Hay 1902, Kemp 1982, Kissel and Lehman 2002, Kuhn 1946, Kuhn 1966, Lewis and Vaughn 1965, Nopcsa 1923 and Romer and Price 1940

Sister taxa: Edaphosauridae, Haptodontiformes, Sphenacomorpha, Varanopidae

Subtaxa: Archaeothyris Clepsydropinae Clepsydrops Embolophorus Ophiacodon Varanosaurus

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Type: Ophiacodon

Distribution:

• Leonard of United States (5: Oklahoma, Texas collections)

• Wolfcamp of United States (14: Colorado, New Mexico, Texas, Utah)

• Permian of the United Kingdom (1), United States (40: Kansas, Ohio, Oklahoma, Texas, Utah)

• Virgilian of United States (3: New Mexico, Oklahoma)

• Carboniferous to Permian of United States (1: New Mexico)

• Carboniferous of Canada (1: Nova Scotia), the Czech Republic (1), United States (3: Illinois, Ohio, Pennsylvania)

Total: 69 collections including 95 occurrences

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