Class [Mammalia] Linnaeus, 1758 - mammals Order Primates Linnaeus, 1758 - primates Family Callithricidae - marmosets and tamarins see Family Callitrichidae Gray, 1821 Genus Callithrix Erxleben, 1777 - marmosets Callithrix humeralifer (E. Geoffroy, 1812) - Santarem marmoset see Callithrix humeralifera (É. Geoffroy Saint-Hilaire, 1812)