Order Primates Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1 111 184 book chapter 0-8018-8221-4 10.5281/zenodo.7316519 Saguinus graellsi Jimenez de la Espada 1870 Saguinus graellsi Jimenez de la Espada 1870 , Bol. Rev. Univers. Madrid: 19 . Type Locality: Peru , Loreto , Tarapoto, opposite mouth of Rio Curaray, Rio Napo. Vernacular Names: Graells's Tamarin . Distribution: Peru , Ecuador , Colombia , west of Rio Napo, from Rio Putumayo south to Rio Marañon, west to Rio Santiago. Conservation: CITES – Appendix II. Discussion: S. nigricollis species group. Raised to rank of full species by Groves (2001 c ) , contra Hershkovitz (1977:628) .