Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
         Class Amphibia Gray, 1825 [paraphyletic]
           Subclass †Lepospondyli Zittel, 1888 see Superorder Lepospondyli Zittel, 1887
             1 Order †Aïstopoda
             2 Order †Nectridea Miall, 1875
             3 Order †Microsauria Dawson, 1863
             4 Order †Lysorophia [monotypic]
             5 Family †Adelogyrinidae Watson, 1930
             6 Family †Acherontiscidae Carroll, 1969