Mammaliaformes Rowe 1988, nom. cl. inval. see Clade Mammaliaformes Rowe 1988 [Rowe 2020]
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     1 Subclass Prototheria Gill, 1872 - monotremes
     2 Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988