Clade Mammaliaformes Rowe 1988 [Rowe 1988] [crown] Class Mammalia Linnaeus, 1758 - mammals 1 Subclass Prototheria Gill, 1872 - monotremes see Order Monotremata C.L. Bonaparte, 1837 2 Subclass Theriiformes (Rowe, 1988) M.C. McKenna & S.K. Bell, 1997 see Division Theriiformes