Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
             Class Amphibia Linnaeus, 1758 - amphibians see Class Amphibia Gray, 1825
               Subclass Urodelomorpha Säve-Söderbergh, 1934 see Order Urodela Dumeril, 1806
                 Order Caudata Scopoli, 1777
                   Suborder Cryptobranchoidea Dunn, 1922 see [unranked] Cryptobranchoidei Noble, 1931
                     1 Family Hynobiidae Cope, 1859 (1856)
                     2 Family Cryptobranchidae Fitzinger, 1826