Abstract

The pelycosaurian reptile Scoliomus puercensis Williston and Case, 1913, based on several postcranial elements from the Permo-Pennsylvanian redbeds of the Cutler Formation of north-central New Mexico, proves on comparative study to be a junior synonym of Sphenacodon ferox of the family Sphenacodontidae. As Romer and Price noted, features originally cited as unique to the holotype are attributable to imperfect restoration. Although correctly recognizing S. puercensis as belonging to the suborder Sphenacodontia, they mistakenly assigned it to the family Varanopseidae, mainly on the basis of its small size.

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