Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
   1 Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
   2 Amphibia Gray 1825 [Gauthier, Kluge & Rowe 1988] - amphibians see Class Amphibia Gray, 1825