[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Animalia Linnaeus, 1758 - animals
     Branch Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
       Division Bilateria Hatschek, 1888 see Subkingdom Bilateria Hatschek, 1888
         Subdivision Deuterostomia Grobben, 1908 see Infrakingdom Deuterostomia Grobben, 1908
           Phylum Chordata Bateson, 1885 - chordates
             Subphylum Vertebrata Cuvier, 1812 - vertebrates
               Superclass Tetrapoda Goodrich, 1930 - tetrapods see [unranked] Tetrapoda Goodrich, 1930
                 Class Mammalia Linnaeus, 1758 - mammals
                   Subclass Theria Parker & Haswell, 1897
                     Infraclass Eutheria Gill, 1872
                       01 Order Insectivora Bowdich, 1821 - insectivores see Superorder Insectivora Bowdich, 1821
                       02 Order Dermoptera Dobson, 1883
                       03 Order Chiroptera Blumenbach, 1779 - bats
                       04 Order Primates Linnaeus, 1758 - primates
                       05 Order †Tillodontia Marsh, 1875
                       06 Order †Taeniodonta Cope, 1876
                       07 Order Edentata Vicq-d'Azyr, 1792 see Order Xenarthra Cope, 1889
                       08 Order Pholidota Weber, 1904 - pangolins
                       09 Order Lagomorpha Brandt, 1855 - lagomorphs
                       10 Order Rodentia Bowdich, 1821 - rodents
                       11 Order Cetacea Brisson, 1762 - whales, dolphins, and porpoises see Infraorder Cetacea Brisson, 1762
                       12 Order Carnivora Bowdich, 1821 - carnivores
                       13 Order Pinnipedia Illiger, 1811 - seals, sea lions, and walrus see Parvorder Pinnipedia Illiger, 1811
                       14 Order †Condylarthra Cope, 1881
                       15 Order †Litopterna Ameghino, 1889
                       16 Order †Notoungulata Roth, 1903
                       17 Order †Astrapotheria Lydekker, 1894
                       18 Order Tubulidentata Huxley, 1872 - aardvark
                       19 Order †Pantodonta Cope, 1873
                       20 Order †Dinocerata Marsh, 1873
                       21 Order †Pyrotheria Ameghino, 1895
                       22 Order Proboscidea Owen, 1859 - elephants
                       23 Order †Embrithopoda Andrews, 1906
                       24 Order Hyracoidea Huxley, 1869 - hyraxes
                       25 Order Sirenia Gill, 1872 - sea cows
                       26 Order Perissodactyla Owen, 1848 - odd-toed ungulates
                       27 Order Artiodactyla Owen, 1848 - even-toed ungulates see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997