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
               Family †Aetiocetidae Emlong, 1966
                 1 Genus †Aetiocetus Emlong, 1966
                 2 Genus †Ashorocetus Barnes & Kimura, 1994
                 3 Genus †Chonecetus Russell, 1968
                 4 Genus †Fucaia Marx et al., 2015
                 5 Genus †Morawanocetus Kimura & Barnes, 1994
                 6 Genus †Willungacetus Pledge, 2005