After Carroll, 1988, Gebauer, 2007, Kammerer, 2016, and Kammerer & Masyutin, 2018

<==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; Aelurosauroides watsoni]
         |  |-- †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
               |-- †Nochnitsa geminidens Kammerer & Masyutin, 2018
               `--+-- †Viatkogorgon ivachnenkoi Tatarinov, 1999
                  `--+--o “Russian clade”
                     |  |-- †Suchogorgon golubevi Tatarinov, 2000
                     |  `--+--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 †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 “African clade”
                        |-- †Eriphostoma microdon Broom, 1911 [Scylacognathus parvus Broom, 1913; Broomisaurus planiceps (Broom, 1913); Galesuchus gracilis Haughton, 1915; Eoarctops vanderbyli Haughton, 1929]
                        `--+?-o †Scylacognathus Broom, 1913 [jr. syn. Eriphostoma Broom, 1911 sensu Kammerer et al., 2015; 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; Eriphostoma microdon Broom, 1911 Kammerer et al., 2015]
                           |  |-- †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 [jr. syn. Eriphostoma Broom, 1911 sensu Kammerer et al., 2015]
                              |--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]
                                       |--+-- †Smilesaurus ferox Broom, 1948 [taxonomic history]
                                       |  `-- †Arctops willistoni Watson, 1914 [Arctops watsoni Brink & Kitching, 1953; Arctops kitchingi Sigogneau, 1970; Lycaenops angusticeps Laurin, 1998 (in partim]
                                       `--o †Rubidgeinae Broom, 1938 sensu Kammerer, 2016 [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]
                                                   `--o †Rubidgeini Broom, 1938 sensu Kammerer, 2016
                                                      |-- †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]
    †‘Arctopsnyassaensis [=? Lycaenops minor nyassaensis; Aelurognathus nyasaensis Haughton, 1926]
    †Broomisaurus 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 and Kammerer & Masyutin, 2018

<==o †Gorgonopsia
    `--o †Gorgonopsidae
       |-- †Nochnitsa
       `--+-- †Viatkogorgon
          `--+--o “Russian clade”
             |  |-- †Suchogorgon
             |  `--+-- †Sauroctonus
             |     `--+-- †Pravoslavleria
             |        `-- †Inostrancevia
             `--o “African clade”
                |-- †Eriphostoma
                `--+-- †Gorgonops
                   `--+-- †Arctognathus
                      |-- †Lycaenops
                      |--+-- †Smilesaurus
                      |  `-- †Arctops
                      `--o †Rubidgeinae
                         |-- †Aelurognathus
                         `--+-- †Ruhuhucerberus
                            `--+-- †Sycosaurus
                               `--+-- †Leontosaurus 
                                  `--+-- †Dinogorgon
                                     `--+-- †Clelandina
                                        `-- †Rubidgea

Reference(s):

  • Kammerer, C. F., 2016: Systematics of the Rubidgeinae (Therapsida: Gorgonopsia).
    –PeerJ: Vol. 4, Art.nr. e1608, pp. 1-109 [doi: 10.7717/peerj.1608]
  • Kammerer, C. F. & Masyutin, V., 2018: Gorgonopsian therapsids (Nochnitsa gen. nov. and Viatkogorgon) from the Permian Kotelnich locality of Russia.
    –PeerJ: Vol. 6, Art.nr. e4954, pp. 1-31 [doi: 10.7717/peerj.4954]

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.