Saguinus nigricollis (Spix, 1823) . Sim. Vespert. Brasil., p. 28.

TYPE LOCALITY: Brazil, Amazonas, Sao Paulo de Olivenca .

DISTRIBUTION: W. Brazil; E. Peru; E. Ecuador.

COMMENT: Includes graellsi; see Hershkovitz, 1977:628.

PROTECTED STATUS: CITES - Appendix II as Order Primates .

ISIS NUMBER: 5301406007004017001 as S. nigricollis .

5301406007004006001 as S. graellsi.