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
               1 Family †Arguitheriidae Dashzeveg, 1994
               2 Family †Arguimuridae Dashzeveg, 1994
               3 Family †Vincelestidae Bonaparte, 1986
               4 Infralegion †Peramura McKenna, 1975 see Order Peramura McKenna, 1975
               5 Infralegion Tribosphenida McKenna, 1975 see Sublegion Boreosphenida