PaleoDB taxon number: 122486
Full reference: A. S. Romer. 1936. Studies on American Permo-Carboniferous reptiles. Problems of Paleontology 1:85-93
Sister taxon: Secodontosaurus obtusidens
Type specimen: FMNH (WM) 573, a partial skull (one maxilla and one dentary). Its type locality is Craddock Bonebed, Brush Creek, 38 (Arroyo Formation), which is in a Kungurian terrestrial claystone/sandstone in the Arroyo Formation of Texas.