Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     Class Mammalia Linnaeus, 1758 - mammals
       Family †Aegialodontidae Kermack, 1967
       Order †Anagalida Szalay & McKenna, 1971
       Order †Apatotheria Scott & Jepsen, 1936
       Order Artiodactyla Owen, 1848 - even-toed ungulates see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
       Order †Asiadelphia Trofimov & Szalay, 1993
       Order †Astrapotheria Lydekker, 1894
       Order Carnivora Bowdich, 1821 - carnivores
       Order Cetacea Brisson, 1762 - whales, dolphins, and porpoises see Infraorder Cetacea Brisson, 1762
       Order Chiroptera Blumenbach, 1779 - bats
       Order †Condylarthra Cope, 1881
       Order †Creodonta Cope, 1875
       Family †Deltatheridiidae Gregory & Simpson, 1926
       Order Dermoptera Dobson, 1883
       Order †Desmostylia Reinhart, 1953
       Family †Didymoconidae Kretzoi, 1943
       Order †Dinocerata Marsh, 1873
       Order †Docodonta Kretzoi, 1946 - docodonts
       Family †Donodontidae Sigogneau-Russell, 1991
       Order Edentata Vicq-d'Azyr, 1792 see Order Xenarthra Cope, 1889
       Order †Embrithopoda Andrews, 1906
       Family †Epoicotheriidae Simpson, 1927
       Family †Ernanodontidae Ding, 1979
       Order †Eupantotheria Kermack & Mussett, 1958
       Family †Gondwanatheriidae Bonaparte, 1986 see Family Sudamericidae Scillato-Yané & Pascual, 1984
       Order Hyracoidea Huxley, 1869 - hyraxes
       Order Insectivora Bowdich, 1821 - insectivores see Superorder Insectivora Bowdich, 1821
       Family †Kennalestidae Kielan-Jaworowska, 1981 see Family Gypsonictopidae Van Valen, 1967
       Order Lagomorpha Brandt, 1855 - lagomorphs
       Order †Leptictida McKenna, 1975
       Order †Litopterna Ameghino, 1889
       Order Macroscelidea Butler, 1956 - elephant shrews
       Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818
       Order †Mesonychia Matthew, 1937
       Family †Metacheiromyidae Wortman, 1903
       Family †Mingotheriidae Schoch, 1985 see Family Pseudictopidae Sulimski, 1969
       Order Monotremata Bonaparte, 1837 - monotremes
       Order †Multituberculata Cope, 1884
       Order †Notopterna Soria, 1984 see Order Litopterna Ameghino, 1889
       Order †Notoungulata Roth, 1903
       Order †Pantodonta Cope, 1873
       Order †Pantolesta McKenna, 1975
       Order Perissodactyla Owen, 1848 - odd-toed ungulates
       Order Pholidota Weber, 1904 - pangolins
       Order Primates Linnaeus, 1758 - primates
       Order Proboscidea Owen, 1859 - elephants
       Order †Pyrotheria Ameghino, 1895
       Order Rodentia Bowdich, 1821 - rodents
       Order Scandentia Wagner, 1855 - tree shrews
       Order Sirenia Gill, 1872 - sea cows
       Order †Symmetrodonta Simpson, 1925 see Infraclass Symmetrodonta Simpson, 1925
       Order †Taeniodonta Cope, 1876
       Order †Tegotheridia Tatarinov, 1994 see Order Docodonta Kretzoi, 1946
       Family †Theroteinidae Sigogneau-Russell, Frank & Hemmerlé, 1986
       Order †Tillodontia Marsh, 1875
       Family †Todralestidae Gheerbrant, 1991
       Order †Triconodonta Osborn, 1888
       Order Tubulidentata Huxley, 1872 - aardvark
       Order †Xenungulata Paula Couto, 1952
       Family †Yingabalanaridae Archer, Every, Godthelp, Hand & Scally, 1990
       Family †Zalambdalestidae Gregory & Simpson, 1926