Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Infraclass Eutheria Gill, 1872
       Magnorder Boreoeutheria Springer & de Jong, 2001
         Superorder Laurasiatheria Waddell, Okada & Hasegawa, 1999
           Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
             Suborder Whippomorpha
               Infraorder Cetacea Brisson, 1762
                 Parvorder Odontoceti Flower, 1867 - toothed whales
                   1 Superfamily Physteroidea orth. inval. see Superfamily Physeteroidea Gray, 1821
                   2 Superfamily Ziphioidea Gray, 1850 [monotypic]
                   3 Superfamily Platanistoidea Gray, 1846 [monotypic]
                   4 Superfamily Lipotoidea de Muizon, 1988 [monotypic]
                   5 Superfamily Inioidea de Muizon, 1988
                   6 Superfamily Delphinoidea Gray, 1821