Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates 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