Acheloma

Acheloma Temporal range: Early Permian, 279.5–272.5 Ma PreЄ Є O S D C P T J K Pg N
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Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Amphibia
Order:	†Temnospondyli
Family:	†Trematopidae
Genus:	†Acheloma
Species
A. cumminsi Cope, 1882 A. dunni Polley & Reisz, 2011
Synonyms
Trematops milleri Williston, 1909

Skeleton

Acheloma (also known as Trematops milleri) is an extinct genus of temnospondyl that lived during the Early Permian. The type species is A. cumminsi. Trematops milleri has been synonymized with Acheloma. Like other trematopids, Acheloma was a large terrestrial carnivore, as shown both by its morphology and bone microanatomy. One species, A. dunni, may have been the top predator of the diverse Richards Spur assemblage in Oklahoma. The following cladogram shows the phylogenetic position of Acheloma, from Polley & Reisz, 2011.

Dissorophoidea	Sclerocephalus haeuseri Micromelerpeton credneri Micropholis stowi Eoscopus lockardi  Olsoniformes  Cacops morrisi  Trematopidae  Phonerpeton pricei  Acheloma  Acheloma cumminsi Acheloma dunni Actiobates peabodyi Ecolsonia cutlerensis Anconastes vesperus Tambachia trogallas