Mammaliaformes Rowe 1988
   [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
                                   Parvorder Mysticeti Cope, 1891 - whalebone whales
                                     01 Genus †Mizuhoptera Hatai, Hayasaka & Masuda, 1963 see Genus Herpetocetus van Beneden, 1872
                                     02 ?Genus †Siphonocetus Cope, 1895, nom. dub.
                                     03 ?Genus †Ulias Cope, 1895, nom. dub.
                                     04 ?Genus †Tretulias Cope, 1895, nom. dub.
                                     05 Genus †Eucetites Ameghino, 1901, nom. dub.
                                     06 Subfamily †Kekenodontinae Mitchell, 1989 see Family Kekenodontidae Mitchell, 1989
                                     07 Subfamily †Llanocetidae Mitchell, 1989 see Family Llanocetidae Mitchell, 1989
                                     08 Family †Aetiocetidae Emlong, 1966
                                     09 Family †Mammalodontidae Mitchell, 1989
                                     10 Family †Cetotheriidae Brandt, 1872
                                     11 Family Balaenopteridae Gray, 1864 - rorquals
                                     12 Family Balaenidae Gray, 1821 - right whales