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
                     1 †Protungulatum donnae Sloan & Van Valen, 1965
                     2.1.1.1.1[68] †Hyopsodus sp. Leidy, 1870
                     2.1.1.1.2 †Hyopsodus paulus Leidy, 1870
                     2.1.1.2.1[69] †Litomylus dissentaneus Simpson, 1935
                     2.1.1.2.2 †Apheliscus insidiosus (Cope, 1874)
                     2.1.2.1.1[70] †Tetraclaenodon puercensis (Cope, 1881)
                     2.1.2.1.2 †Phenacodus intermedius Granger, 1915
                     2.1.2.2 Subfamily †Kolpaniinae 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, orth. inval. see Subfamily Kollpaniinae Marshall et al., 1990
                     2.1.2.2.3.1.1[71] †Escribania chubutensis Bonaparte et al., 1993
                     2.1.2.2.3.1.2 †Didolodus multicuspis Ameghino, 1897
                     2.1.2.2.3.2 †Protolipterna ellipsodontoides Cifelli, 1983
                     2.2.1.1[73] †Dissacus praenuntius Matthew & Granger, 1915
                     2.2.1.2 †Mesonyx obtusidens Cope, 1871
                     2.2.2.1 †Rodhocetus balochistanensis Gingerich et al., 2001
                     2.2.2.2 [crown] Euungulata Waddell, Kishino & Ota 2001 see Grandorder Euungulata Waddell, Kishino & Ota, 2001