Mammaliaformes Rowe 1988, nom. cl. inval. see Clade Mammaliaformes Rowe 1988 [Rowe 2020]
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
       Infraclass Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg, 1995 see Clade Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg 1995
         Superlegion Trechnotheria McKenna, 1975 see Clade Trechnotheria McKenna 1975
           Legion Cladotheria McKenna, 1975 see Clade Cladotheria McKenna 1975
             Sublegion Zatheria McKenna, 1975 see Clade Zatheria McKenna 1975
               Infralegion Tribosphenida McKenna, 1975 see Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
                 [crown] Supercohort Theria Parker & Haswell, 1897 - therians see Subclass Theria Parker & Haswell, 1897
                   Cohort Placentalia Owen, 1837 - placentals
                     Magnorder Epitheria McKenna, 1975 see Cohort Placentalia Owen, 1837
                       Superorder Preptotheria McKenna, 1975
                         Grandorder Ungulata Linnaeus, 1766
                           Mirorder Eparctocyona McKenna, 1975
                             Order Cete Linnaeus, 1758 see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
                               Suborder Cetacea Brisson, 1762 - cetaceans see Infraorder Cetacea Brisson, 1762
                                 Infraorder Autoceta Haeckel, 1866
                                   01 Genus †Iniopsis Lydekker, 1893
                                   02 Genus †Microzeuglodon Stromer, 1903
                                   03 Genus †Oligodelphis Aslanova & Mchedlidze, 1976
                                   04 Genus †Mirocetus Mchedlidze, 1970
                                   05 Genus †Atropatenocetus Aslanova, 1977
                                   06 Genus †Kharthlidelphis Mchedlidze & Pilleri, 1988
                                   07 Genus †Archaeodelphis Allen, 1921
                                   08 Genus †Xenorophus Kellogg, 1923
                                   09 Genus †Ceterhinops Leidy, 1877
                                   10 Genus †Miodelphis Wilson, 1935
                                   11 Genus †Protodelphinus Dal Piaz, 1922
                                   12 Genus †Scaptodon Chapman, 1918, nom. dub.
                                   13 Genus †Sinanodelphis Makiyama, 1936
                                   14 Genus †Imerodelphis Mchedlidze, 1959
                                   15 Genus †Stereodelphis Gervais, 1848, nom. dub.
                                   16 Genus †Macrochirifer Brandt, 1874, nom. dub.
                                   17 Genus †Delphinopsis Müller, 1853, nom. dub.
                                   18 Genus †Heterodelphis Brandt, 1873
                                   19 Genus †Phocageneus Leidy, 1869
                                   20 Genus †Hadrodelphis Kellogg, 1966
                                   21 Genus †Nannolithax Kellogg, 1931
                                   22 Genus †Platylithax Kellogg, 1931
                                   23 Genus †Agabelus Cope, 1875, nom. dub.
                                   24 Genus †Priscodelphinus Leidy, 1851, nom. dub.
                                   25 Genus †Ixacanthus Cope, 1868, nom. dub.
                                   26 Genus †Tretosphys Cope, 1868, nom. dub.
                                   27 Genus †Belosphys Cope, 1875, nom. dub.
                                   28 Genus †Pelodelphis Kellogg, 1955, nom. dub.
                                   29 Genus †Araeodelphis Kellogg, 1957
                                   30 Genus †Graphiodon Leidy, 1870, nom. dub.
                                   31 Genus †Oedolithax Kellogg, 1931
                                   32 Genus †Lamprolithax Kellogg, 1931
                                   33 Genus †Loxolithax Kellogg, 1931
                                   34 Genus †Delphinavus Lull, 1914
                                   35 Genus †Hesperocetus True, 1912, nom. dub.
                                   36 Genus †Lonchodelphis Allen, 1924, nom. dub.
                                   37 Genus †Incacetus Colbert, 1944
                                   38 Family †Agorophiidae Abel, 1913
                                   39 Superfamily †Squalodontoidea Brandt, 1873 see Superfamily Platanistoidea Gray, 1846
                                   40 Parvorder Mysticeti Cope, 1891 - whalebone whales
                                   41 Parvorder Odontoceti Flower, 1867 - toothed whales