Full reference: A. S. Romer. 1937. New genera and species of pelycosaurian reptiles. Proceedings of the New England Zo÷logical Club 16:89-95
Sister taxon: Varanosaurus acutirostris
Type specimen: MCZ 1353, a set of postcrania (incomplete pelvis). Its type locality is Slippery Creek, 20 (Belle Plains Formation), which is in an Artinskian terrestrial claystone/limestone in the Belle Plains Formation of Texas.