Kingdom Animalia Linnaeus, 1758 - animals Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812 Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Infraclass Marsupialia Jameson, 1818 see Cohort Marsupialia Jameson, 1818 Order Microbiotheria Ameghino, 1889 [monotypic] Family Microbiotheriidae Ameghino, 1887