†unranked clade Haptodontiformes Spindler 2015 (synapsid)
Full reference: F. Spindler. 2015. The basal Sphenacodontia: Systematic revision and evolutionary implications. 385
Parent taxon: Eupelycosauria according to F. Spindler 2015
Sister taxa: Edaphosauridae, Ophiacodontidae, Sphenacomorpha, Varanopidae
Subtaxa: Eohaptodus Haptodus Hypselohaptodus Kenomagnathus Tenuacaptor
Ecology:
Distribution:
• Permian of France (1 collection), Germany (3), the United Kingdom (1)
• Carboniferous of United States (1: Kansas)
Total: 6 collections including 8 occurrences