Synonym: Trematops milleri Williston 1909
Full reference: E. D. Cope. 1882. Third contribution to the history of the Vertebrata of the Permian formation of Texas. Proceedings of the American Philosophical Society 20:447-461
Sister taxon: Acheloma dunni
- Acheloma cumminsi: AMNH 4205, a partial skeleton (skull, presacral vertebrae with ribs, scapulacoracoids, and humeri)
- Trematops milleri: FMNH UC 640, a partial skeleton (skull and postcrania). Its type locality is Craddock Bonebed, Brush Creek, 38 (Arroyo Formation), which is in a Kungurian terrestrial claystone/sandstone in the Arroyo Formation of Texas.
Ecology: ground dwelling carnivore