Mammaliaformes Rowe 1988
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Prototheria Gill, 1872 - monotremes
       1 Order Platypoda Gill, 1872 - platypuses see Order Monotremata Bonaparte, 1837
       2 Order Tachyglossa Gill, 1872 see Order Monotremata Bonaparte, 1837