Abstract

Bayloria morei from the Lower Permian (Arroyo Formation, Clear Fork Group: Leonardian) of Baylor County, Texas, formerly thought to be the smallest known pelycosaur, is an immature specimen of the captorhinid reptile Captorhinus aguti. As the latter name has priority, Bayloria Olson 1941 is the junior synonym of Captorhinus Case 1911 and B. morei Olson 1941 of C. aguti (Cope, 1882). Removal of Bayloria morei from the pelycosaurian family Eothyrididae reduces the latter to two monospecific genera, Eothyris parkeyi and Oedaleops campi.

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