Arctosuchus
Arctosuchus is an extinct genus of gorgonopsid from the Lopingian (Permian). The type species, "A. tigrinus", is from the Teekloof Formation ("Tropidostoma" Assemblage Zone), although a second species, "A. buceros", from the Wolfville Formation (Upper Wolfville Member) of Nova Scotia, Canada, may also belong to the genus, but it is from the Triassic and it probably instead belongs to an indeterminate synapsid. The type and only specimen of "A. tigrinus" consists of a fragmentary skull and fragmentary dentary. The remains of "A. buceros" are unknown and are possibly now lost.