Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Infraclass Eutheria Gill, 1872 Cohort Unguiculata Linnaeus, 1766 Order Primates Linnaeus, 1758 - primates Suborder Anthropoidea Mivart, 1864 see Parvorder Anthropoidea Mivart, 1864 Family Callitrichidae Gray, 1821 - marmosets, tamarins