Full reference: R. DeMar. 1970. A Primitive Pelycosaur from the Pennsylvanian of Illinois. Journal of Paleontology 44(1):154-163
Sister taxa: none
Type specimen: FMNH 701, a partial skeleton (pelvis, hind limb and pes, caudal vertebrae). Its type locality is Newton Locality, which is in a Virgilian lacustrine deltaic mixed carbonate-siliciclastic in the Mattoon Formation of Illinois.