A New Pareiasaur (Parareptilia) from the Lower Vyatkian (Upper Permian) of Orenburg Region, Russia

A new genus and species, Senectosaurus karamzini gen. et sp. nov. was described based on remains of the postcranial skeleton of a large adult pareiasaur from the Lower Vyatkian of Preobrazhenka-2 locality (Orenburg Region). The new pareiasaur is characterized by large postcranial osteoderms of the platform type. Osteoderms are flattened, with flat ventral and slightly convex dorsal surfaces, with one to three contact facets from a toothed or scaly suture connection with neighboring osteoderms, without dorsal elevation and surrounding fossae circumcinctae and with numerous large fossae on the dorsal surface of the platform. The absence of dorsal elevation distinguishes the new pareiasaur from all known pareiasaurs with postcranial osteoderms.