Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
Count: 1g; †5f;20g;4s
   Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
  Count: 1g; †5f;20g;4s
     Synapsida Osborn 1903 [Gauthier et al. 1989]
    Count: †5f;20g;4s
       Therapsida Broom, 1905
      Count: †5f;17g;4s
         †Eutheriodontia
        Count: †5f;17g;4s
           Cynodontia Owen 1861 [Gauthier, Kluge & Rowe 1988]
          Count: †5f;17g;4s
             1 Genus †Procynosuchus Broom, 1937
            Count: -
             2.1 Genus †Thrinaxodon Seeley, 1894
            Count: -
             2.2.1 Genus †Diademodon Seeley, 1895
            Count: -
             2.2.2.1 Genus †Exaeretodon Cabrera, 1943
            Count: -
             2.2.2.2 Genus †Scalenodontoides Crompton & Ellenberger, 1957
            Count: -
             2.2.2.3 Genus †Scalenodon Crompton, 1955
            Count: -
             2.2.2.4 Genus †Luangwa Brink, 1963
            Count: -
             2.2.2.5 Mammaliamorpha Rowe 1988
            Count: †5f;10g;4s