Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Class Mammalia Linnaeus, 1758
   Cetartiodactyla Montgelard, Catzeflis & Douzery 1997 see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
     Whippomorpha Waddell, Okada & Hasegawa 1999 see Suborder Whippomorpha
       Cetacea Brisson 1762 see Suborder Cetacea Brisson, 1762
         Pelagiceti Uhen, 2008
           Neoceti Fordyce & de Muizon, 2001
             Odontoceti Flower, 1867 see Parvorder Odontoceti Flower, 1867
               Superfamily Physeteroidea Gray, 1821
                 01 [stem] Genus †Livyatan Lambert, Bianucci, Post, de Muizon, Salas-Gismondi, Urbina & Reumer, 2010
                 02 [stem] Genus †Ferecetotherium Mchedlidze, 1970
                 03 [stem] Genus †Acrophyseter Lambert, Bianucci & de Muizon, 2008
                 04 [stem] Genus †Brygmophyseter Barnes, 2006
                 05 [stem] Genus †Diaphorocetus Ameghino, 1894
                 06 [stem] Genus †Eudelphis du Bus, 1872
                 07 [stem] Genus †Zygophyseter Bianucci & Landini, 2006
                 08 Family Kogiidae Gill, 1871
                 09.1 [stem] Genus †Idiorophus Kellogg, 1925
                 09.2 [stem] Genus †Placoziphius van Beneden, 1869
                 09.3 [stem] †"Ontocetus" oxymycterus Kellogg, 1925 see Albicetus oxymycterus (Kellogg, 1925)
                 09.4 Family Physeteridae Gray, 1821 - sperm whales
                 10 Genus †Hoplocetus Gervais, 1848
                 11 Genus †Preaulophyseter Caviglia & Jorge, 1980
                 12 Genus †Scaldicetus Du Bus, 1867