Arctognathus is an extinct genus of gorgonopsids that throve during the Late Permian in the Karoo basin of what is now South Africa.

[2] A carnivore, like all gorgonopsid, Arctognathus was given its name ("Bear jaw") in reference to its short and rounded snout.

[3] It was a small gorgonopsid with a total length estimated at 1.1 m and an 18 cm skull.

[4] Below is a cladogram from the phylogenetic analysis of Gebauer (2007):[5] Aloposaurus Cyonosaurus Aelurosaurus Scylacognathus Eoarctops Gorgonops Njalila Lycaenops Arctognathus Inostrancevia Aelurognathus Rubidgea Sycosaurus Clelandina

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