Mammaliaformes Rowe 1988 [crown] Class Mammalia Linnaeus, 1758 - mammals Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988 Infraclass †Triconodonta Osborn, 1888 see Order Triconodonta Osborn, 1888 Family †Amphilestidae Osborn, 1888 Subfamily †Amphilestinae Osborn, 1888 see Family Amphilestidae Osborn, 1888 Genus †Amphilestes Owen, 1859