Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
   Amphibia Gray 1825 [Gauthier, Kluge & Rowe 1988] - amphibians see Class Amphibia Gray, 1825
     Batrachia Latreille, 1800
       Caudata Fischer von Waldheim, 1813 see Order Caudata Scopoli, 1777
         Cryptobranchoidei Noble, 1931
           1 Family Cryptobranchidae Fitzinger, 1826
           2 Family Hynobiidae Cope, 1859 (1856)