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 Odontoceti Flower, 1867 - toothed whales
                                     Superfamily Hyperoodontoidea Gray, 1846 see Superfamily Ziphioidea Gray, 1850
                                       Family Hyperoodontidae Gray, 1846 see Family Ziphiidae Gray, 1850
                                         01 Genus †Notocetus Moreno, 1892
                                         02 Genus †Medocinia de Muizon, 1988
                                         03 Genus †Belemnoziphius Huxley, 1864
                                         04 Genus †Pelycorhamphus Cope, 1895, nom. dub.
                                         05 Genus †Squalodelphis Dal Piaz, 1916
                                         06 Genus †Choneziphius Duvernoy, 1851
                                         07 Genus Mesoplodon Gervais, 1850 - beaked whales
                                         08 Genus †Squaloziphius de Muizon, 1991
                                         09 Genus †Cetorhynchus Gervais, 1861
                                         10 Genus †Ziphirostrum Du Bus, 1868
                                         11 Genus †Messapicetus Bianucci, Landini & Varola, 1992
                                         12 Genus †Palaeoziphius Abel, 1905, nom. dub.
                                         13 Genus †Ziphioides Probst, 1886, nom. dub.
                                         14 Genus †Anoplonassa Cope, 1869
                                         15 Genus †Proroziphius Leidy, 1876
                                         16 Genus †Eboroziphius Leidy, 1876, nom. dub.
                                         17 Genus †Ninoziphius de Muizon, 1983
                                         18 Genus Hyperoodon Lacépède, 1804 - bottle-nosed whales
                                         19 Genus Ziphius Cuvier, 1823 - goose-beaked whale
                                         20 Genus †Berardiopsis Portis, 1886, nom. dub.
                                         21 Genus Berardius Duvernoy, 1851 - giant bottle-nosed whales
                                         22 Genus Tasmacetus Oliver, 1937 - Shepherd's beaked whale
                                         23 Genus Indopacetus Moore, 1968 - Indo-Pacific beaked whale