Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Gnathostomata
     Teleostomi Bonaparte, 1836
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988], nom. cl. inval. see Clade Tetrapoda Hatschek & Cori 1896 [Laurin 2020]
         Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988], nom. cl. inval. - amniotes see Clade Amniota Haeckel 1866 [Laurin & Reisz 2020]
           Class Mammalia Linnaeus, 1758 - mammals
             Subclass Prototheria Gill, 1872 - monotremes
               Order †Triconodonta Osborn, 1888
                 1 Family †Sinoconodontidae Mills, 1971
                 2 Family †Morganucodontidae Kühne, 1958
                 3 Family †Amphilestidae Osborn, 1888
                 4 Family †Triconodontidae Marsh, 1887