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
         Family †Pakicetidae Thewissen et al., 1996
           1 Genus †Ichthyolestes Dehm & Oettingen-Spielberg, 1958
           2 Genus †Nalacetus Thewissen & Hussain, 1998
           3 Genus †Pakicetus Gingerich & Russell, 1981
           4 ?Genus †Himalayacetus Bajpai & Gingerich, 1998