Vertebrata Cuvier, 1812 - vertebrates Gnathostomata Teleostomi Tetrapoda Goodrich, 1930 Amniota Haeckel, 1866 - amniotes Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Infraclass †Trituberculata 1 Order †Symmetrodonta Simpson, 1925 see Infraclass Symmetrodonta Simpson, 1925 2 Genus †Shuotherium Chow & Rich, 1982 3 Order †Eupantotheria Kermack & Mussett, 1958