Kingdom [Animalia] Linnaeus, 1758 - animals Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Class Mammalia Linnaeus, 1758 - mammals Subclass Prototheria Gill, 1872 - monotremes 1 Infraclass Allotheria (Marsh, 1880) 2 Infraclass †Eotheria (Kermack & Mussett, 1958)