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
                                     Family †Cetotheriidae Brandt, 1872
                                       01 Genus †Cetotheriopsis Brandt, 1871
                                       02 Genus †Mauicetus Benham, 1939
                                       03 Genus †Cophocetus Packard & Kellogg, 1934
                                       04 Genus †Cetotherium Brandt, 1843
                                       05 Genus †Pelocetus Kellogg, 1965
                                       06 Genus †Aglaocetus Kellogg, 1934
                                       07 Genus †Diorocetus Kellogg, 1968
                                       08 Genus †Pinocetus Czyzewska & Ryziewicz, 1976
                                       09 Genus †Tiphyocetus Kellogg, 1931
                                       10 Genus †Metopocetus Cope, 1896
                                       11 Genus †Imerocetus Mchedlidze, 1964
                                       12 Genus †Mesocetus van Beneden, 1880
                                       13 Genus †Herpetocetus van Beneden, 1872
                                       14 Genus †Isocetus Van Beneden, 1880
                                       15 Genus †Peripolocetus Kellogg, 1931
                                       16 Genus †Halicetus Kellogg, 1969
                                       17 Genus †Eucetotherium Brandt, 1873
                                       18 Genus †Cetotheriomorphus Brandt, 1873, nom. dub.
                                       19 Genus †Parietobalaena Kellogg, 1924
                                       20 Genus †Thinocetus Kellogg, 1969
                                       21 Genus †Otradnocetus Mchedlidze, 1984
                                       22 Genus †Heterocetus Capellini, 1877
                                       23 Genus †Nannocetus Kellogg, 1930
                                       24 Genus †Mixocetus Kellogg, 1934
                                       25 Genus †Amphicetus Beneden, 1880
                                       26 Genus †Cephalotropis Cope, 1896
                                       27 Genus †Piscocetus Pilleri & Pilleri, 1989
                                       28 Genus †Rhegnopsis Cope, 1896, nom. dub.
                                       29 Genus †Piscobalaena Pilleri & Siber, 1989