Mammaliaformes Rowe 1988 [nom. cl. nov.]
   [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
                 1 Genus †Hypomylos Sigogneau-Russell, 1992
                 2 Family †Necrolestidae Ameghino, 1894
                 3 Supercohort †Aegialodontia (Butler, 1978) M.C. McKenna & S.K. Bell, 1997 see Order Aegialodontia Butler, 1978
                 4 Supercohort Theria Parker & Haswell, 1897 - therians see Clade Theria Parker & Haswell, 1897