Mammaliaformes Rowe 1988, nom. cl. inval. see Clade Mammaliaformes Rowe 1988 [Rowe 2020]
   [crown] Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Clade Mammalia Linnaeus 1758 [Rowe 2020]
     Theriimorpha Rowe 1993
       Theria Parker & Haswell 1897 [McKenna 1975] see Subclass Theria Parker & Haswell, 1897
         Eutheria Gill 1872 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Infraclass Eutheria Gill, 1872
           Placentalia Owen 1837 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Cohort Placentalia Owen, 1837
             Epitheria McKenna 1975
               Boreoeutheria Springer & de Jong 2001 see Magnorder Boreoeutheria Springer & de Jong, 2001
                 [crown] Laurasiatheria Waddell, Okada & Hasegawa 1999 see Superorder Laurasiatheria Waddell, Okada & Hasegawa, 1999
                   Pan-Euungulata O'Leary, Bloch, Flynn, Gaudin, Giallombardo, Giannini, Goldberg, Kraatz, Luo, Meng, Ni, Novacek, Perini, Randall, Rougier, Sargis, Silcox, Simmons, Spaulding, Velazco, Weksler, Wible & Cirranello 2013
                     Euungulata Waddell, Kishino & Ota 2001 see Grandorder Euungulata Waddell, Kishino & Ota, 2001
                       Artiodactylamorpha Spaulding et al. 2009
                         Artiodactyla Owen 1848
                           Cetancodonta Arnason, Gullberg, Gretarsdottir, Ursing & Janke 2000
                             Cetaceamorpha Spaulding et al. 2009
                               1 †Pakicetus inachus Gingerich & Russell, 1981
                               2 †Artiocetus clavis Gingerich et al., 2001
                               3.1 †Basilosaurus cetoides (Owen, 1839)
                               3.2 Cetacea Brisson 1762 see Suborder Cetacea Brisson, 1762