Mammaliaformes Rowe 1988
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
       Infraclass Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg, 1995 see Clade Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg 1995
         Superlegion Trechnotheria McKenna, 1975 see Clade Trechnotheria McKenna 1975
           Legion Cladotheria McKenna, 1975 see Clade Cladotheria McKenna 1975
             Sublegion Zatheria McKenna, 1975 see Clade Zatheria McKenna 1975
               Infralegion Tribosphenida McKenna, 1975 see Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
                 [crown] Supercohort Theria Parker & Haswell, 1897 - therians see Subclass Theria Parker & Haswell, 1897
                   Cohort Placentalia Owen, 1837 - placentals
                     Magnorder Xenarthra Cope, 1889 - xenarthrans see Superorder Xenarthra Cope, 1889
                       Order Pilosa Flower, 1883 - sloths
                         Suborder Phyllophaga Owen, 1842 see Suborder Folivora Delsuc, Catzeflis, Stanhope & Douzery, 2001
                           Infraorder Megatheria McKenna & Bell, 1997
                             Superfamily Megatherioidea Gray, 1821
                               Family ‡Megatheriidae Gray, 1821
                                 Subfamily ‡Megatheriinae Gray, 1821
                                   Tribe ‡Nothrotheriini Ameghino, 1920
                                     01 Genus †Pronothrotherium Ameghino, 1907
                                     02 Genus †Xyophorus Ameghino, 1887
                                     03 Genus †Chasicobradys Scillato-Yane, Carlini & Vizcaino, 1987
                                     04 Genus †Gilsolaresia Roselli, 1976
                                     05 Genus †Diheterocnus Kraglievich, 1928
                                     06 Genus †Synhapalops Kraglievich, 1930
                                     07 Genus †Nothropus Burmeister, 1882
                                     08 Genus †Thalassocnus de Muizon & McDonald, 1995
                                     09 Genus ‡Nothrotherium Lydekker, 1889
                                     10 Genus ‡Nothrotheriops Hoffstetter, 1955