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]
     Synapsida Osborn 1903 [Gauthier et al. 1989], nom. cl. inval. see Clade Synapsida Osborn 1903 [Laurin & Reisz 2020]
       Therapsida Broom, 1905 see Clade Therapsida Broom 1905 [Rowe 2020]
         †Eutheriodontia
           Cynodontia Owen 1861 [Gauthier, Kluge & Rowe 1988], nom. cl. inval. see Clade Cynodontia Owen 1861 [Rowe 2020]
             Mammaliamorpha Rowe 1988, nom. cl. inval. see Clade Mammaliamorpha Rowe 1988 [Rowe 2020]
               Mammaliaformes Rowe 1988, nom. cl. inval. see Clade Mammaliaformes Rowe 1988 [Rowe 2020]
                 Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Clade Mammalia Linnaeus 1758 [Rowe 2020]
                   1 Monotremata Bonaparte 1837 [Rowe 1988], nom. cl. inval. see Clade Monotremata Fischer 1823 [Rowe, Bhullar & Wallace 2020]
                   2 †Dryolestida Prothero 1981 see Order Dryolestida Prothero, 1981
                   3 Genus †Ambolotherium
                   4 Genus †Amphitherium Blainville, 1838
                   5 Genus †Amphilestes Owen, 1859
                   6.1 Genus †Phascolotherium Owen, 1838
                   6.2 Genus †Triconodon Owen, 1859
                   6.3 Genus †Peramus Owen, 1871
                   6.4 Genus †Trioracodon Simpson, 1928
                   6.5 Genus †Spalacotherium Owen, 1854
                   6.6 Theriiformes Rowe 1988