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 Marsupialia - marsupials
                     Magnorder Ameridelphia (Szalay, 1982) M.C. McKenna & S.K. Bell, 1997
                       Order Paucituberculata Ameghino, 1894
                         Superfamily Caenolestoidea (Trouessart, 1898) Osborn, 1910
                           Family Caenolestidae Trouessart, 1898 - "shrew" opossums
                             Subfamily †Pichipilinae (Marshall, 1980) M.C. McKenna & S.K. Bell, 1997
                               Genus †Pichipilus Ameghino, 1890