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
     1 Synapsida Osborn 1903 [Gauthier et al. 1989]
    Count: †5f;20g;4s
     2 Reptilia Linnaeus 1758 [Gauthier, Kluge & Rowe 1988], nom. cl. inval. see Class Reptilia Linnaeus, 1758
    Count: 1g