Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
         Class Amphibia Gray, 1825 [paraphyletic]
           modern amphibian orders
             Order Urodela Dumeril, 1806 see Order Caudata Scopoli, 1777
               Suborder †Prosirenoidea Estes, 1981 [monotypic]
                 1 Family †Prosirenoideaᵀ Carroll, 1988, nom. null. see Family Prosirenidae Estes, 1969