Genus: Gorgonops OWEN, 1876
Etymology: Greek, gorgon, a mythical monster, and Greek, ops, “face, appearance”: Gorgon face.
= Chiwetasaurus HAUGHTON, 1926
Etymology: In reference to Chiweta, in North Nyasaland, South Africa, where the fossil was found, and Greek, sauros, “lizard”: Chiweta lizard.
= Leptotrachelus WATSON, 1921
Etymology: Greek, leptos, “slender”, Greek, trakhelos, “neck” (m): Slender neck.
= Pachyrhinos BROILI & SCHROEDER, 1934
Etymology: Greek, pakhys, “thick”, Greek, rhin- (rhis), “snout” + os (m): Thick snout.
= Scymnognathus BROOM, 1911
Etymology: Greek, Skymos, “lion cub”, Greek, gnathos, “jaw” + us (m): Lion-cub snout.

Species: torvus OWEN, 1876
Etymology:

Holotype: BMNH R1647

Locality: Mildenhalls near Fort Beaufort, 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.

Probably topotype AMNH 5515

Locality: Beaufort West, Cape Colony, 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: Skull.

Referred material:

MANTEN, 1958

Locality: Farm Driehoeksfontein in the Murraysburg 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:

BP 290: Skull and lower jaw.

 

SIGOGNEAU, 1970

Locality: Driehoeksfontein, Murraysburg District, Western Cape Province, South Africa.

Horizon:

Biostratigraphy: Cistecephalus zone (formerly Aulacephalodon-Cistecephalus zone KEYSER, 1979, SACS, 1980, Aulacephalodon baini zone KEYSER & SMITH, 1977-78, Upper Cistecephalus Zone, KITCHING, 1970, 77, Lower Cistecephalus zone WATSON, 1914).

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

Material:

BP 277: Skull and dentary.

 


Locality: Rooipoort, Murraysburg District, Western Cape Province, South Africa.

Horizon:

Biostratigraphy: Cistecephalus zone (formerly Aulacephalodon-Cistecephalus zone KEYSER, 1979, SACS, 1980, Aulacephalodon baini zone KEYSER & SMITH, 1977-78, Upper Cistecephalus Zone, KITCHING, 1970, 77, Lower Cistecephalus zone WATSON, 1914).

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

Material:

BP 385: Fragmentary skull.

 


Locality: Nobelfontein, Biesjiespoort area, Victoria West District, Northern 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:

BP 386: Fragmentary skull and dentary.

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Species: whaitsi (BROOM, 1912)
Etymology:
= Scymnognathus whaitsi BROOM, 1912

Holotype: AMNH 5530

Locality: Beaufort West Commonage, 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: Nearly complete skull with part of left mandible.

Topotype: AMNH 5544: Fragmentary skull.

Topotype: AMNH 5546: Snout.

AMNH 5531: Greater part of skull.

AMNH 5568: Fragmentary skull.

Referred material:

= Scymnognathus cf. whaitsi BROILI & SCHRODER, 1935 (XIII)
= Cf. Gorgonops whaitsi (BROILI & SCHRODER, 1935 (XIII)) SIGOGNEAU, 1970

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

Horizon: Middle Abrahamskraal Formation.

Biostratigraphy: Pristerognathus Assemblage zone (Diictodon-Pristerognathus Assemblage zone, Tapinocephalus zone of WATSON 1914, KITCHING, 1970,1977)

Age: Early Tatarian age, Guadelupian Stage, Middle Zeichstein Epoch, Middle Permian.

Material:

MS 1934 VIII 28: Fragmentary skull and fragmentary skeleton.

 


SIGOGNEAU, 1970

Locality: Beaufort West Commonage, 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:

BMNH R4053, R4052: Fragmentary skulls.

 


Locality: Driehoeksfontein, Murraysburg 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:

BP 290: Skull and dentary.

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Species: eupachygnathus (WATSON, 1921)
Etymology:
= Scymnosuchus whaitsi WATSON, 1921
= Scymnognathus whaitsi (WATSON, 1921)
= Leptotrachelus eupachygnathus WATSON, 1921
= Leptotracheliscops eupachygnathus (WATSON, 1921)

Holotype: BMNH R4051

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

Horizon: Middle Abrahamskraal Formation.

Biostratigraphy: Pristerognathus Assemblage zone (Diictodon-Pristerognathus Assemblage zone, Tapinocephalus zone of WATSON 1914, KITCHING, 1970,1977)

Age: Early Tatarian age, Guadelupian Stage, Middle Zeichstein Epoch, Middle Permian.

Material: Skull and lower jaw.
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Species: dixeyi (HAUGHTON, 1926)
Etymology:
= Chiwetasaurus dixeyi HAUGHTON, 1926

Holotype: SAM 7846

Locality: B2 Bed, Chiweta, Nyaassaland, Malawi, East Africa.

Horizon:

Biostratigraphy: Equivalent to the Endothiodon zone (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.
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Species: kaiseri HAUGHTON (BROILI & SCHROEDER, 1934)
Etymology:
= Pachyrhinos kaiseri BROILI & SCHROEDER, 1934

Holotype: BSP 1934 VIII 10

Locality: La-de-da, Beaufort West District, Western Cape Province, South Africa.

Horizon: Middle Abrahamskraal Formation.

Biostratigraphy: Pristerognathus Assemblage zone (Diictodon-Pristerognathus Assemblage zone, Tapinocephalus zone of WATSON 1914, KITCHING, 1970,1977)

Age: Early Tatarian age, Guadelupian Stage, Middle Zeichstein Epoch, Middle Permian.

Material: Fragmentary skull.