Mammaliaformes Rowe 1988
   [crown] Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Class Mammalia Linnaeus, 1758
     Theriimorpha Rowe 1993
       [crown] 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
           [crown] Placentalia Owen 1837 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Cohort Placentalia Owen, 1837
             [crown] Epitheria McKenna 1975
               [crown] 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
                     [crown] Euungulata Waddell, Kishino & Ota 2001 see Grandorder Euungulata Waddell, Kishino & Ota, 2001
                       Artiodactylamorpha Spaulding et al. 2009
                         [crown] Artiodactyla Owen 1848
                           [crown] Cetancodonta Arnason, Gullberg, Gretarsdottir, Ursing & Janke 2000
                             1.1[80] †Merycopotamus sp. Falconer & Cautley, 1845
                             1.2 Hippopotamus amphibius Linnaeus, 1758 - hippopotamus
                             2 Cetaceamorpha Spaulding et al. 2009