Vertebrata Cuvier, 1812 - vertebrates Gnathostomata Teleostomi Tetrapoda Goodrich, 1930 Amniota Haeckel, 1866 - amniotes Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Theria of Metatherian-Eutherian grade Infraclass Eutheria Gill, 1872 Family †Kennalestidae Kielan-Jaworowska, 1981 see Family Gypsonictopidae Van Valen, 1967