vertebrates Cuvier, 1812 - vertebrates
   Class Amphibia Linnaeus, 1758 - amphibians see Class Amphibia Gray, 1825
     Subclass Lissamphibia Haeckel, 1866 see Infraclass Lissamphibia Haeckel, 1866
       Order Urodela Dumeril, 1806 see Order Caudata Scopoli, 1777
         Suborder Cryptobranchoidea Dunn, 1922 see [unranked] Cryptobranchoidei Noble, 1931
           1 Family Cryptobranchidae Fitzinger, 1826
           2 Family Ambystomatidae Gray, 1850