Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Infraclass Metatheria Huxley, 1880 Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818 Superfamily Phalangeroidea Thomas, 1888 see Suborder Phalangeriformes Szalay, 1982 Family Phascolomyidae Goldfuss, 1820 see Family Vombatidae Burnett, 1830