After Carroll, 1988, Gebauer, 2007, and Kammerer, 2016

<==o †Gorgonopsia Lydekker, 1890 [sensu Seeley, 1895] sensu Carroll, 1988 (gorgonopsians; gorgonopsit)
   |--o †Aloposaurus Broom, 1910
   |  |-- †A. gracili Broom, 1910
   |  |-- †A. tenuis (Brink & Kitching, 1953) [Aloposauroides tenuis Brink & Kitching, 1953]
   |  `?- †A. cf. Aloposaurus tenuis [MMK 2046] [Cyniscops cookei Broom, 1948, Arctognathus? cookei (Broom, 1948) in Sigogneau, 1970]
   `--+--o †Cyonosaurus Olson, 1937 [Cyniscops Broom, 1937]
      |  |-- †C. longiceps Olson, 1937 [Cyniscops longiceps Broom, 1941]
      |  |-- †C. rubidgei (Broom, 1937) Sigogneau, 1970 [Cyniscops rubidgei Broom, 1937; Cyniscopoides broomi Brink & Kitching, 1953; Cyniscops cf. rubidgei Sigogneau, 1970]
      |  |-- †C. kitchingi (Broom, 1948) Sigogneau, 1970 [Galerhynchus rubidgei Broom, 1937; Cyniscops kitchingi Broom, 1948; ‘Alopecorhynchusrubidgei Broom; Brink & Kitching, 1953 (nom. nud.); Cerdorhinus? rubidgei (Broom, 1937) Sigogneau, 1970]
      |  |-- †C. broomianus (Von Huene, 1950) Gebauer, 2007 [Aelurosaurus? watermeyeri Sigogneau, 1970; Aloposaurus sp. Sigogneau-Russell 1989]
      |  |-- †C. tenuirostris (Boonstra, 1953) Gebauer, 2007 [Tangagorgon tenuirostris Boonstra, 1953; Lycaenops? tenuirostris (Boonstra, 1953) Sigogneau, 1970]
      |  `?- †C. sp. [RC 3] [Nanogorgon gracilis Broom &: Robinson, 1948; cf. Aelurosaurus watermeyeri Sigogneau, 1970]
      `--+--o †Aelurosaurus Owen, 1881 [Aelurosauroides; Aelurosauropsis; Arctognathus]
         |  |-- †A. angusticeps Broom
         |  |-- †A. felinus Owen, 1881 [Aelurosaurus breviceps Broom, 1931, Sigogneau, 1970; Aelurosaurus whaitsi Sigogneau-Russell, 1989; Aelurosaurus sp. Lydekker, 1890; Aelurosaurus whaitsi Broom, 1911; Aelurosaurus? watermeyeri Sigogneau, 1970; Aelurosaurus sp. Sigogneau-Russell, 1989]
         |  |-- †A. striatidens Broom
         |  |-- †A. tenuirostris
         |  `-- †A. wilmanae (Broom, 1940) Sigogneau, 1970 [Aelurosauroides wilmanae Broom, 1940; Aloposaurus gracilis von Huene, 1937; Gorgonopsidae inc. sedis (Sigogneau, 1970); Aelurosaurus? Sigogneau-Russell, 1989)
         `--o †Gorgonopsidae Lydekker, 1890 sensu Gebauer, 2007
            `==o †Gorgonopsinae Sigogneau, 1970 
               |-- †Eriphostoma microdon Broom, 1911 [Galesuchus gracilis Haughton, 1915]
               |--o †Sauroctonus Bystrow, 1955 [Arctognathus Hartmann-Weinberg, 1938; Inostrancevia Efremov, 1940; Sauroctonus Bystrow, 1955]
               |  |-- †S. progressus (Hartmann-Weinberg, 1938) Bystrow, 1955 [Arctognathus progressus Hartmann-Weinberg, 1938; Inostrancevia progressa Efremov, 1940; Sauroctonus progressus Bystrow, 1955]
               |   `-- †S. parringtoni (von Huene, 1950) Gebauer, 2007 [Scymnognathus parringtoni von Huene, 1950; Aelurognathus? parringtoni Sigogneau, 1970]
               `--+--o †Scylacognathus Broom, 1913 [jr. syn. Eriphostoma Broom, 1911??; incl. Arctops Watson, 1914]
                  |  |-- †S. parvus Broom, 1913 [Arctops willistoni Watson, 1914; Cynarioides grimbeeki Broom, 1935; Cynarioides laticeps Broom, 1935; Arctops watsoni Brink & Kitching, 1953; Arctops cf. watsoni (Brink & Kitching, 1953) Sigogneau, 1970; Scylacognathus grimbeeki (Broom, 1935) Sigogneau, 1970]
                  |  |-- †S. robustus (Broom, 1925) Sigogneau, 1970 [Cynariops robustus Broom, 1925; Scylacognathus major Broom, 1935]
                  |  `-- †S. kitchingi (Sigogneau, 1970) Gebauer, 2007 [Aelurognathus minor; Arctops kitchingi Sigogneau, 1970; Arctops? kitchingi Sigogneau-Russell, 1989]
                  `--+-- †Eoarctops vanderbyli Haughton, 1929
                     |--o †Gorgonops Owen, 1876 [Gorgonognathus Haughton, 1915; Pachyrhinos Broili & Schröder, 1934; Gorgonocephalus; Leptotrachelus Watson, 1921; Chiwetasaurus Haughton, 1927; Scymnognathus Watson, 1912; †Scylacops Broom, 1913]
                     |  |-- †G. torvus Owen, 1876 [Gorgonops cf. whaitsi Sigogneau, 1970; Gorgonognathus longifrons Haughton, 1915; Gorgonops longifron†s Haughton, 1915; Sigogneau, 1970]
                     |  |-- G. capensis (Broom, 1913) Gebauer, 2007 [Scylacops capensis Sigogneau 1970; Sycocephalus bigendens Brink & Kitching, 1953; Scylacops bigendens Sigogneau, 1970]
                     |  |-- †G. dixeyi Sigogneau-Russell, 1989 [Chiwetasaurus dixeyi Haughton, 1927; Gorgonops? dixeyi Sigogneau, 1970]
                     |  |?- †G.? eupachygnathus (Watson, 1921) [Scymnosuchus whaitsi Watson, 1912; Scymnognathus whaitsi Watson, 1912, 1914; Leptotrachelus eupachygnathus Watson, 1921; Leptotracheliscops eupachygnathus Kuhn, 1965]
                     |  |?- †G.? kaiseri (Broili & Schröder, 1934) Sigogneau-Russell, 1989 [Pachyrhinos kaiseri Broili & Schröder, 1934; Gorgonops kaiseri Sigogneau, 1970]
                     |  `?- †G.? whaitsi Broom, 1912 [Scymnognathus whaitsi Broom, 1912; Gorgonops whaitsi Sigogneau, 1970]
                     `--+--o †Njalila Gebauer, 2007
                        |  |-- †N. nasuta (von Huene, 1950) Gebauer, 2007 [Dixeya quadrata von Huene, 1950; Dixeya nasuta von Huene, 1950; Arctognathus? nasuta Sigogneau, 1970; Arctognathus? cf. nasuta Sigogneau, 1970]
                        |  `-- †N. insigna Gebauer, 2007 [Scylacops capensis (Broom, 1913) Parrington, 1955]
                        `--+--o †Lycaenops Broom, 1925 [Lycaenoides Broom, 1925; Tigricephalus Broom, 1948; ?Tangagorgon]
                           |  |-- †L. angusticeps (Broom, 1913) Sigogneau, 1970 [Scymnognathus minor Broom, 1913, Lycaenoides angusticeps Broom, 1925; Scymnognathus angusticeps Broom, 1913; ?Alopecognathus angusticeps??]
                           |  |-- †L. attenuatus (Brink & Kitching, 1953) Gebauer, 2007 [Lycaeniodes angusticeps Brink & Kitching, 1953; Aelurognathus cf. serratidens Sigogneau, 1970]
                           |  |-- †L. ornatus Broom, 1925
                           |  |-- †L. quadrata (Haughton, 1927) Gebauer, 2007 [Dixeya quadrata Haughton, 1927, Aelurognathus quadrata Sigogneau, 1970]
                           |  |-- †L. sollasi (Broili & Schröder, 1935) Gebauer, 2007 [Aelurognathus sollasi Broili & Schröder, 1935; Scymnognathus holmesi Broom, 1948; Aelurognathus minor Brink & Kitching, 1953; Lycaenops? minor Sigogneau, 1970]
                           |  |?- †L. sp. [SAM 9344] [Gebauer, 2007] [Aelurognathus microdon Boonstra, 1934; Lycaenops? microdon Sigogneau, 1970]
                           |  |?- †L. sp. [RC 2] [Gebauer, 2007] [Galerhinus rubidgei Broom, 1936; Paragalerhinus rubidgei Sigogneau, 1970]
                           |  `?- †L. sp. [BSP 1932 I 57] [Gebauer, 2007] [Aelurognathus cf. serratidens Broili & Schröder, 1934; cf. Aloposaurus tenuis Sigogneau, 1970]
                           `--+--o †Arctognathus Haughton, 1924 [Lycosaurus Owen, 1876; Seeley, 1895; Aelurosaurus Lydekker, 1890, Lycaenodontoides Boonstra, 1934]
                              |  |-- †A. curvimola Haughton, 1924 [Lycosaurus curvimola Owen, 1876; Seeley, 1895; Aelurosaurus curvimola Lydekker, 1890, Lycaenodontoides bathyrhinus Boonstra, 1934]
                              |  |-- †Arctognathus cf. curvimola [BPI 174, SAM 11490] [Lycaenops pricei Broom & Robinson, 1948]
                              |  `-- †A. breviceps (Boonstra, 1934) Sigogneau, 1970 [Arctognathoides breviceps Boonstra, 1934]
                              `--+--o †Inostranceviinae Sigogneau-Russell, 1989
                                 |  |-- †Pravoslavleria parva (Provoslavlev, 1927a)
                                 |  `--o †Inostrancevia Amalitskii, 1922
                                 |     |-- †I. alexandri Amalitskii, 1922
                                 |     |-- †I. latifrons Provoslavlev, 1927a
                                 |     `-- †I. uralensis Tatarinov, 1974
                                 `--o †Rubidgeinae Broom, 1938 sensu Kammerer, 2016 [taxonomic history]
                                    |-- †Smilesaurus ferox Broom, 1948 [taxonomic history]
                                    `--+-- †Aelurognathus tigriceps (Broom & Haughton, 1913) Haughton, 1924 [taxonomic history]
                                       `--+-- †Ruhuhucerberus haughtoni (Huene, 1950) sensu Kammerer, 2016 [taxonomic history]
                                          `--+--o †Sycosaurus Haughton, 1924 [taxonomic history]
                                             |  |-- †S. laticeps Haughton, 1924 [taxonomic history]
                                             |  `-- †S. nowaki (Broili & Schröder, 1936) [taxonomic history]
                                             `--+-- †Leontosaurus vanderhorsti Broom & George, 1950 [Rubidgea platyrhina Brink & Kitching, 1953; Sycosaurus vanderhorsti Sigogneau, 1970]
                                                `--+-- †Dinogorgon rubidgei Broom, 1936 [taxonomic history]
                                                   `--+-- †Clelandina rubidgei Broom, 1948 [taxonomic history]
                                                      `-- †Rubidgea atrox Broom, 1938 [taxonomic history]

Gorgonopsia incertae sedis:

Arctognathus Broom, 1911
        †Arctognathus pardalis [Lycosaurus pardalis]
        †Arctognathus whaitsi Haughton, 1924 (non Owen, 1876)
        †Arctognathus? cookeiArctosuchus tigrinus (Owen, 1876) Broom, 1911 [Lycosaurus tigrinus Owen, 1876]
    †‘ArctopsnyassaensisBroomisaurus planiceps (Broom, 1913) Joleand, 1920 (nom. nov. pro Scymnorhinus Broom, 1914) [nomen nudum (Gebauer, 2007)]
    †Broomisaurus rubidgei Broom, 1940
    †Cerdodon tenuidens Broom, 1915
    †Cerdorhinus parvidens Broom, 1936
    †Leogorgon klimovensis Ivakhnenko, 2003
    †Niuksenitia sukhonensis Tatarinov, 1977a
    †Paragalerhinus rubidgei Sigogneau, 1970
    †“Prorubidgeapugnax
    †“Prorubidgearobusta

After Kammerer, 2016

<==o †Gorgonopsia
    `--o †Gorgonopsidae
       |-- †Eriphostoma
       `--+-- †Gorgonops
          `--+-- †Arctognathus
             `--+-- †Lycaenops
                `--o †Rubidgeinae
                   |-- †Smilesaurus
                   `--+-- †Aelurognathus
                      `--+-- †Ruhuhucerberus
                         `--+-- †Sycosaurus
                            `--+-- †Leontosaurus 
                               `--+-- †Dinogorgon
                                  `--+-- †Clelandina
                                     `-- †Rubidgea

Reference(s):

  • Kammerer, C. F., 2016: Systematics of the Rubidgeinae (Therapsida: Gorgonopsia).
    –PeerJ: Vol. 4, pp. e1608 [doi: 10.7717/peerj.1608]

After Gebauer, 2007

<==o †Gorgonopsia
   |-- †Aloposaurus
   `--+-- †Cyonosaurus
      `--+-- †Aelurosaurus   
         `--o †Gorgonopsidae
            |-- †Sauroctonus
            `--+-- †Scylacognathus
               `--+-- †Eoarctops
                  |-- †Gorgonops
                  `--+-- †Njalila
                     `--+-- †Lycaenops
                        `--+-- †Arctognathus
                           `--+--o †Inostranceviinae
                              |  `-- †Inostrancevia
                              `--o †Rubidgeinae
                                 |-- †Aelurognathus
                                 `--+-- †Rubidgea
                                    `--+-- †Clelandina
                                       `-- †Sycosaurus

Reference(s):

  • Gebauer, E. V. I., 2007: Phylogeny and Evolution of the Gorgonopsia with a Special Reference to the Skull and Skeleton of GPIT/RE/7113 ('Aelurognathus?' parringtoni). pp. 316 –Eberhard-Karls Universität Tübingen, Geographie, Geoökologie, Geowissenschaft [PDF]

Reference(s):

Special thanks to:

Jos H. M. Dols, for gathering additional information and species.