Clade Mammaliaformes Rowe 1988 [Rowe 1988]
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theriiformes (Rowe, 1988) M.C. McKenna & S.K. Bell, 1997 see Division Theriiformes
       Infraclass Holotheria (Wible et al., 1995) M.C. McKenna & S.K. Bell, 1997 see [unranked] Holotheria
         Superlegion Trechnotheria McKenna, 1975 see [unranked] Trechnotheria McKenna, 1975
           Legion Cladotheria McKenna, 1975 see [unranked] Cladotheria McKenna, 1975
             Sublegion Zatheria McKenna, 1975 see [unranked] Zatheria McKenna, 1975
               Infralegion Tribosphenida McKenna, 1975 see Sublegion Boreosphenida
                 Supercohort Theria (Parker & Haswell, 1897) M.C. McKenna & S.K. Bell, 1997 - therians see [unranked] Theria
                   Cohort Placentalia (Owen, 1837) M.C. McKenna & S.K. Bell, 1997 - placentals
                     Magnorder Xenarthra (Cope, 1889) M.C. McKenna & S.K. Bell, 1997 - xenarthrans
                       Order Pilosa (Flower, 1883) McKenna, 1975 - sloths
                         Suborder Phyllophaga Owen, 1842 see Suborder Folivora Delsuc et al., 2001
                           Infraorder †Mylodonta M.C. McKenna & S.K. Bell, 1997
                             Superfamily †Mylodontoidea (Gill, 1872) M.C. McKenna & S.K. Bell, 1997
                               Family †Mylodontidae (Gill, 1872) Ameghino, 1889
                                 1 Genus †Urumacotherium Bocquentin-Villanueva, 1983
                                 2 Subfamily †Mylodontinae Gill, 1872
                                 3 Subfamily †Lestodontinae (Ameghino, 1889) M.C. McKenna & S.K. Bell, 1997