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 1 Infraclass †Allotheria Marsh, 1880 see [unranked] Allotheria 2 Infraclass †Triconodonta (Osborn, 1888) Vandebroek, 1964 see Order Triconodonta Osborn, 1888 3 Infraclass Holotheria (Wible et al., 1995) M.C. McKenna & S.K. Bell, 1997 see [unranked] Holotheria