Name Acheloma
Class Chordata,‭ ‬Amphibia,‭ ‬Temnospondyli,‭ ‬Trematopidae
Name Translation Unknown
Period Permian
Location USA, Oklahoma, Texas
Diet Carnivore/Piscivore
Size Unknown
Acheloma (also known as Trematops milleri) is an extinct genus of temnospondyl that lived during theEarly Permian.[1][2] The type species is A. cumminsi.Trematops milleri has been synonymized with Acheloma. Like other trematopids, Acheloma was a large terrestrial carnivore. One species, A. dunni, may have been the top predator of the diverse Richards Spur assemblage in Oklahoma. The following cladogram shows the phylogeneticposition of Acheloma, from Polley & Reisz, 2011.[3]
Acheloma 12DB

Sclerocephalus haeuseri

Micromelerpeton credneri

Micropholis stowi

Eoscopus lockardi


Cacops morrisi


Phonerpeton pricei


Acheloma cumminsi

Acheloma dunni

Actiobates peabodyi

Ecolsonia cutlerensis

Anconastes vesperus

Tambachia trogallas

Remians inculde Holotype (OMNH 73281): nearly complete skull with associated atlas–axis complex and partial lower jaw.

Referred specimens: BMRP2007.3.4 (skull),  BMRP2007.3.1 (snout), OMNH
52365 (jaw articulation), OMNH 73514 (pelvic girdle), OMNH 52545, (right humerus)

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