Abstract:
The genus Raphanodon Ivachnenko, 1987 (Leptorophidae, Seymouriamorpha) is not a valid taxon, since its type species Nycteroleter ultimus Tchudinov et Vjuschkov, 1956 is assigned to the genus Karpinskiosaurus. The cranial anatomy of K. ultimus is described in the present paper with newly collected material from the Babintsevo locality. The genus Karpinskiosaurus is assigned to the subfamily Karpinskiosaurinae, which is affiliated to the Lower Permian Discosauriscinae (Discosauriscits and Ariekanerpeton) to form the family Karpinskiosauridae.
