Perplexisaurus
Perplexisaurus is a genus of therocephalian therapsid from the Middle to Late Permian Deltavjatia vjatkensis [Assemblage Zone|Deltavjatia vjatkensis Assemblage Zone], Vanyushonki Member of the Urpalov Formation of Russia. It was described by L. P. Tatarinov in 1997, and the type species is P. foveatus. A new species, P. lepusculus, was described by M.F. Ivachnenko in 2011, from Russia.