Phylum Chordata Bateson, 1885 - chordates Count: - Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801 Count: - Class Mammalia Linnaeus, 1758 - mammals Count: - Order Monotremata Bonaparte, 1837 - monotremes Count: - Family †Kollikodontidae Flannery, Archer, Rich & Jones, 1995 Count: -