Kingdom Animalia Linnaeus, 1758 - animals Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812 Class Mammalia Linnaeus, 1758 - mammals 1 Subclass Prototheria Gill, 1872 [monotypic] - monotremes 2 Subclass Theria Parker & Haswell, 1897