Phylum Chordata Bateson, 1885 - chordates
Subphylum Vertebrata Cuvier, 1812 - vertebrates
see Infraphylum Vertebrata Lamarck, 1801
Class Mammalia Linnaeus, 1758 - mammals
Order Monotremata Bonaparte, 1837 - monotremes
Family †Kollikodontidae Flannery, Archer, Rich & Jones, 1995
Family Ornithorhynchidae Gray, 1825 - platypuses
Family Tachyglossidae Gill, 1872 - spiny anteaters