Genus: Hyenosaurus BROOM, 1935
Etymology: Greek, hyaina, “hyaena” and Greek, sauros, “lizard”: Hyena lizard.

Species: platyceps BROOM, 1935
Etymology:

Holotype: Transvaal Museum 258

Locality: Unknown, South Africa.

Horizon: Unknown.

Biostratigraphy:

Age: Late Permian?

Material: Fragmentary portion of lower jaw.