Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Infraclass Tribosphenida McKenna, 1975 see Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001 Supercohort Eutheria Gill, 1872 see Infraclass Eutheria Gill, 1872 Cohort Edentata Cuvier, 1798 Order †Palaeanodonta Matthew, 1918