Phylum [Vertebrata] Lamarck, 1801 see Infraphylum Vertebrata Lamarck, 1801
   Class Amphibia Linnaeus, 1758 - amphibians see Class Amphibia Gray, 1825
     Subclass †Lepospondyli Zittel, 1888 see Superorder Lepospondyli Zittel, 1887
       Order †Nectridea Miall, 1875
         Family †Keraterpetontidae Jaekel, 1903
           1 Genus †Diplocaulus Cope, 1877
           2 Genus †Keraterpeton Etheridge, 1866