1 Natura - nature
   2.1 actualia - actual entities
     2 Mundus Plinius - physical world
       3 naturalia - natural bodies
         2 Biota
           3.2 Domain Eukaryota Chatton, 1925 - eukaryotes
             1 Amorphea Adl et al., 2012
               3.2 Opisthokonta Cavalier-Smith, 1987
                 1 Holozoa
                   2.2.2 Kingdom Animalia Linnaeus, 1758 - animals
                     3 Epitheliozoa Ax, 1996
                       2 Eumetazoa Bütschli, 1910 - eumetazoans
                         2 Bilateria Hatschek, 1888 - bilaterians
                           7 Eubilateria Ax, 1987
                             2 Superphylum Deuterostomia Grobben, 1908 - deuterostomes
                               2.2 [crown] Phylum Chordata Bateson, 1885 - chordates
                                 3.2 Subphylum Vertebrata Cuvier, 1812 - vertebrates
                                   3.2.2 [crown] Myopterygii - myopterygians
                                     2.2.2 [crown] Superclass Gnathostomata Zittel, 1879 - jawed vertebrates
                                       2.2 Grade Teleostomi Bonaparte, 1836
                                         2 Euteleostomi - bony vertebrates
                                           2.2.2 Sarcopterygii Romer, 1955
                                             2.2.2.2.2 [crown] Rhipidistia Cope, 1887
                                               2 Tetrapodomorpha Ahlberg, 1991
                                                 2.2 [crown] Osteolepidimorpha
                                                   2.1.2.n.2 Superclass Tetrapoda Goodrich, 1930 - tetrapods
                                                     2.2.2.2.2.2.2.2.2.2 Reptiliomorpha Säve-Söderbergh, 1934
                                                       1.n Batrachosauria
                                                         2.2 Amniota Haeckel, 1866 - amniotes
                                                           2.1 Synapsida Osborn, 1903
                                                             1.n Therapsida Broom, 1905
                                                               2.2.2 Theriodontia
                                                                 2 Eutheriodontia
                                                                   2 Cynodontia Owen, 1861
                                                                     2.2.2 Eucynodontia Kemp, 1982
                                                                       2.2.2.3 Mammaliamorpha Rowe, 1988
                                                                         2.2 Mammaliaformes Rowe, 1988
                                                                           5.2.2.2.2 Holotheria
                                                                             3 Class Mammalia Linnaeus, 1758 - mammals
                                                                               2 Theriimorpha
                                                                                 2 Theriiformes Rowe, 1986
                                                                                   2 Trechnotheria McKenna, 1975
                                                                                     2 Cladotheria McKenna, 1975
                                                                                       2 Zatheria McKenna, 1975
                                                                                         5 Subclass Boreosphenida
                                                                                           4.2 Theria
                                                                                             18 Infraclass Eutheria Huxley, 1880
                                                                                               4.2.2.2 Cohort Placentalia (Owen, 1837) M.C. McKenna & S.K. Bell, 1997 - placentals
                                                                                                 15.2 Magnorder Boreoeutheria
                                                                                                   5 Grandorder Laurasiatheria
                                                                                                     2 Scrotifera
                                                                                                       2.2 Fereuungulata Waddell et al., 1999
                                                                                                         1.1 Order †Arctocyonia
                                                                                                         1.2 Order †Acreodi Matthew, 1909
                                                                                                         1.3.1 ?Genus †Protungulatum Sloan & Van Valen, 1965
                                                                                                         1.3.2 Euungulata Waddell et al., 1999
                                                                                                         2 ?Superorder †Bulbulodentata Archibald, 1998
                                                                                                         3 Superorder †Meridiungulata McKenna, 1975
                                                                                                         4.1 Superorder Ferae (Linnaeus, 1758) Simpson, 1945
                                                                                                         4.2 Superorder Pholidotamorpha Gaudin et al., 2009