Alternative combination: Lythrosuchus langstoni
Full reference: R. A. Long and P. A. Murry. 1995. Late Triassic (Carnian and Norian) tetrapods from the southwestern United States. New Mexico Museum of Natural History and Science Bulletin 4:1-254
Sister taxon: Poposaurus gracilis
Type specimen: TMM 31025-12, a set of postcrania (Ilium). Its type locality is Otis Chalk Quarry 1, SMU 122, TMM 31025, which is in a Carnian/Norian crevasse splay mudstone/mudstone in the Cooper Canyon Formation of Texas.