Mammaliaformes Rowe 1988
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Prototheria Gill, 1872 - monotremes
       Order Tachyglossa Gill, 1872 see Order Monotremata Bonaparte, 1837
         Family Tachyglossidae Gill, 1872 - spiny anteaters
           1 Genus Zaglossus Gill, 1877 - long-nosed echidna
           2 Genus Tachyglossus Illiger, 1811 - short-nosed echidna