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
             Class Amphibia Linnaeus, 1758 - amphibians see Class Amphibia Gray, 1825
               Subclass †Lepospondyli Zittel, 1888 see Superorder Lepospondyli Zittel, 1887
                 Order †Nectridea Miall, 1875
                   Family †Diplocaulidae Cope, 1881
                     Genus †Diplocaulus Cope, 1877