Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Mammalia Linnaeus, 1758 - mammals
               Subclass Eutheria Gill, 1872 see Infraclass Eutheria Gill, 1872
                 Superorder Protungulata
                   1 Order †Condylarthra Cope, 1881
                   2 Order †Tillodontia Marsh, 1875
                   3 Order †Litopterna Ameghino, 1889
                   4 Order †Notoungulata Roth, 1903
                   5 Order †Astrapotheria Lydekker, 1894
                   6 Order Tubulidentata Huxley, 1872 - aardvark