Cetacea/Artiodactyla Montgelard, Catzeflis & Douzery 1997 see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
   Order Cetacea Brisson, 1762 - whales, dolphins, and porpoises see Infraorder Cetacea Brisson, 1762
     1 Family †Pakicetidae Thewissen et al., 1996
     2.1 Family †Ambulocetidae Thewissen et al., 1996
     2.2 Family †Remingtonocetidae Kumar & Sahni, 1986
     2.3 Family †Protocetidae Stromer, 1908
     2.4 Family †Basilosauridae Cope, 1868
     2.5 Mysticeti Cope, 1891 - whalebone whales
     2.6 Odontoceti Flower, 1867 - toothed whales