Mammaliaformes Rowe 1988 [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 Genus †Hahnodon Sigogneau-Russell, 1991