Vertebrata Cuvier, 1812 - vertebrates Gnathostomata Teleostomi Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988] Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes Mammalia Linnaeus, 1758 - mammals Theria Parker & Haswell, 1897 †Trituberculata †Symmetrodonta Simpson, 1925 see Infraclass Symmetrodonta Simpson, 1925 †Spalacotheriidae Marsh, 1887