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
           Genus †Diplocaulus Cope, 1877
           Genus †Keraterpeton Etheridge, 1866