Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Infraclass Eutheria Gill, 1872 Cohort Ferungulata Superorder Protungulata 1 Order †Condylarthra Cope, 1881 2 Order †Litopterna Ameghino, 1889 3 Order †Notoungulata Roth, 1903 4 Order †Astrapotheria Lydekker, 1894 5 Order Tubulidentata Huxley, 1872 - aardvark