PaleoDB taxon number: 113850
Full reference: S. W. Williston. 1910. New Permian reptiles; rhachitomous vertebrae. Journal of Geology 18:585-600
Type specimen: CNHM (FMNH) UC 656, a skull. Its type locality is Indian Creek, 35 (Arroyo Formation), which is in a Kungurian terrestrial claystone/sandstone in the Arroyo Formation of Texas.