Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Clade Mammalia Linnaeus 1758 [Rowe 2020]
   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
         Pelagiceti Uhen, 2008
           Neoceti Fordyce & de Muizon, 2001
             Odontoceti Flower, 1867 see Parvorder Odontoceti Flower, 1867
               Family †Xenorophidae Uhen, 2008
                 1 Genus †Albertocetus Uhen, 2008
                 2 Genus †Archaeodelphis Allen, 1921
                 3 Genus †Cotylocara Geisler, Colbert & Carew, 2014
                 4 Genus †Xenorophus Kellogg, 1923