|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
It was reranked as the order Ophiacodontidae by Gardiner (1982).
It was assigned to Ophiacodontia by Kuhn (1946); to Ophiacodontia by Nopcsa (1923) and Lewis and Vaughn (1965); to Captorhinomorpha by Gardiner (1982); to Eupelycosauria by Kemp (1982) and Reisz (1986); to Pelycosauria by Carroll (1988); and to Eupelycosauria by Kissel and Lehman (2002).
|Year||Name and author|
|1878||Clepsydropidae Cope p. 529|
|1910||Poliosauridae Case p. 183|
|1923||Ophiacodontidae Nopcsa p. 18|
|1946||Ophiacodontidae Kuhn p. 56|
|1965||Ophiacodontidae Lewis and Vaughn p. C26|
|1982||Ophiacodontidae Gardiner p. 228|
|1982||Ophiacodontidae Kemp p. 348|
|1986||Ophiacodontidae Reisz p. 66|
|2002||Ophiacodontidae Kissel and Lehman p. 536|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.