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
             Odontoceti Flower, 1867 see Parvorder Odontoceti Flower, 1867
               1 Family †Ashleycetidae Sanders & Geisler, 2015 [monotypic]
               2.1 Family †Xenorophidae Uhen, 2008
               2.2.1? Family †Mirocetidae Sanders & Geisler, 2015 [monotypic]
               2.2.2.1 Family †Agorophiidae Abel, 1913 [monotypic]
               2.2.2.2.1 Family †Simocetidae Fordyce, 2002 [monotypic] - pug-nosed whales
               2.2.2.2.2.1 Family †Patriocetidae Abel, 1914 [monotypic]
               2.2.2.2.2.2.2.1? Genus †Papahu Aguirre-Fernández & Fordyce, 2014
               2.2.2.2.2.2.2.2.2.1? Genus †Prosqualodon Lydekker, 1894
               2.2.2.2.2.2.2.2.2.2.1? Genus †Squaloziphius de Muizon, 1991
               2.2.2.2.2.2.2.2.2.2.2.1 Superfamily Physeteroidea Gray, 1821
               2.2.2.2.2.2.2.2.2.2.2.2.1.1 Genus †Argyrocetus Lydekker, 1894
               2.2.2.2.2.2.2.2.2.2.2.2.1.2 Genus †Macrodelphinus Wilson, 1935
               2.2.2.2.2.2.2.2.2.2.2.2.1.3 Genus †Chilcacetus Lambert et al., 2015
               2.2.2.2.2.2.2.2.2.2.2.2.2 Synrhina Geisler et al., 2011