Trimerorhachis

Trimerorhachis; Temporal range: Early Permian,
	A large skull of Trimerorhachis insignis (AMNH 7116) in the American Museum of Natural History
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Amphibia
Order:	†Temnospondyli
Suborder:	†Dvinosauria
Family:	†Trimerorhachidae
Genus:	†Trimerorhachis; Cope, 1878
Species
	†T. insignis Cope, 1878 (type); †T. mesops Cope, 1896; †T. rogersi Olson, 1955; †T. sandovalensis Berman and Reisz, 1980; †T. greggi Milner and Schoch, 2013;

Trimerorhachis is an extinct genus of dvinosaurian temnospondyl within the family Trimerorhachidae. It is known from the Early Permian of the southwestern United States, with most fossil specimens having been found in the Texas Red Beds. The type species of Trimerorhachis, T. insignis, was named by American paleontologist Edward Drinker Cope in 1878. Cope named a second species from Texas, T. mesops, in 1896. The species T. rogersi (named in 1955) and T. greggi (named in 2013) are also from Texas, and the species T. sandovalensis (named in 1980) is from New Mexico.

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