Class Mammalia Linnaeus, 1758 - mammals
   Order Monotremata Bonaparte, 1837 - monotremes
     Family Tachyglossidae Gill, 1872 - spiny anteaters
       1 Genus Tachyglossus Illiger, 1811 - short-nosed echidna
       2 Genus Zaglossus Gill, 1877 - long-nosed echidna