Mammaliaformes Rowe 1988, nom. cl. inval. see Clade Mammaliaformes Rowe 1988 [Rowe 2020]
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
       Infraclass †Allotheria Marsh, 1880 see Clade Allotheria Marsh 1880
         Order †Multituberculata Cope, 1884
           Family †Hahnodontidae Sigogneau-Russell, 1991
             1 Genus †Hahnodon Sigogneau-Russell, 1991