Mammalia [Linnaeus 1758 [Rowe 1988], nom. cl. inval.]
   Cetartiodactyla [Montgelard, Catzeflis & Douzery 1997]
     Whippomorpha [Waddell, Okada & Hasegawa 1999]
       Cetacea [Brisson 1762]
         Pelagiceti [Uhen, 2008]
           Neoceti [Fordyce & de Muizon, 2001]
             Odontoceti [Flower, 1867]
               Physeteroidea [Gray, 1821]
                 Kogiidae [Gill, 1871]
                   1 Kogia [Gray, 1846]
                   2 †Aprixokogia [Whitmore & Kaltenbach, 2008]
                   3 †Nanokogia [Velez-Juarbe et al., 2015]
                   4 †Praekogia [Barnes, 1973]
                   5 †Thalassocetus [Abel, 1905]
                   6 †Scaphokogia [de Muizon, 1988]
                   7 †Kogiopsis [Kellogg, 1929]