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
         Pelagiceti Uhen, 2008
           Neoceti Fordyce & de Muizon, 2001
             Mysticeti Cope, 1891 see Parvorder Mysticeti Cope, 1891
               Chaeomysticeti Mitchell, 1989
                 Balaenomorpha Geisler & Sanders, 2003
                   Plicogulae Geisler, McGowen, Young & Gatesy, 2011
                     Family †Tranatocetidae Gol'din & Steeman, 2015
                       1 †"Cetotherium" megalophysum (Cope, 1895)
                       2 †"Metopocetus" vandelli
                       3 †"Aulocetus" latus Kellogg, 1940
                       4 Genus †Mesocetus van Beneden, 1880
                       5 Genus †Mixocetus Kellogg, 1934
                       6 Genus †Tranatocetus Gol'din & Steeman, 2015