Mammaliaformes Rowe 1988, nom. cl. inval. see Clade Mammaliaformes Rowe 1988 [Rowe 2020]
   [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
           Genus Zaglossus Gill, 1877 - long-nosed echidna