Genus: Scymnognathus BROOM, 1915 non BROOM, 1912
Etymology: Greek, skymnos, “lion cub”, Greek, gnathos, “jaw” + us (m): Lion-cub snout.

Species: parvus BROOM, 1915
Etymology:
= Gorgonops parvus (BROOM, 1915)

Holotype: BMNH R4139

Locality: Kuilspoort, Beaufort West District, Western Cape Province, South Africa.

Horizon: Hoedemaker member, Middle Teekloof Formation.

Biostratigraphy: Tropidostoma zone (Tropidostoma-Endothidon Assemblage zone KEYSER, 1979, SACS, 1980, Tropidostoma microtrema zone KEYSER & SMITH, 1977-78, Lower Cistecephalus zone KITCHING, 1970, 1977, Endothiodon zone, WATSON, 1914).

Age: Tatarian Age, Lopingian Subepoch, Zechstein Epoch, Late Permian.

Material: Fragmentary skull and dentary.
_____________________________________________________________________________________

Species: major OLSON & BROOM, 1937
Etymology: Latin, major, "greater."

Holotype: FMNH UC 1513

Locality: Brakwater farm northeast of Murraysburg, west of Victoria road, and three-quarters of a miles south of river crossing, South Africa.

Horizon: Hoedemaker member, Middle Teekloof Formation.

Biostratigraphy: Tropidostoma zone (Tropidostoma-Endothidon Assemblage zone KEYSER, 1979, SACS, 1980, Tropidostoma microtrema zone KEYSER & SMITH, 1977-78, Lower Cistecephalus zone KITCHING, 1970, 1977, Endothiodon zone, WATSON, 1914).

Age: Tatarian Age, Lopingian Subepoch, Zechstein Epoch, Late Permian.

Material: Skull and dentary.