Full reference: S. P. Modesto and R. R. Reisz. 2002. An Enigmatic New Diapsid Reptile from the Upper Permian of Eastern Europe. Journal of Vertebrate Paleontology 22(4):851-855
Sister taxa: none
Type specimen: PIN 162/56, a partial skull. Its type locality is Lower Mezen' River, which is in a Kazanian/Urzhumian terrestrial horizon in the Krasnoshchel' Formation of the Russian Federation.