[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Vertebrata (Lamarck, 1801)
         Branch Craniata Linnaeus, 1758
           Grade Gnathostoma
             Subgrade Pentadactyla branchiata
               Class Amphibia Gray, 1825
                 Subclass Lissamphibia Haeckel, 1866 see Infraclass Lissamphibia Haeckel, 1866
                   Order Urodela Dumeril, 1806 see Order Caudata Scopoli, 1777
                     Genus Proteus Laurenti, 1768