Cetacea Brisson 1762 see Suborder Cetacea Brisson, 1762
   Neoceti Fordyce & de Muizon, 2001
     Odontoceti Flower, 1867 see Parvorder Odontoceti Flower, 1867
       Physeteroidea Gray, 1821
         Kogiidae Gill, 1871
           1 Genus †Aprixokogia Whitmore & Kaltenbach, 2008
           2.1 Genus †Thalassocetus Abel, 1905
           2.2.1 Genus †Scaphokogia de Muizon, 1988
           2.2.2.1 Genus †Praekogia Barnes, 1973
           2.2.2.2 Genus Kogia Gray, 1846 - pygmy and dwarf sperm whales