Saimiri ustus (I. Geoffroy, 1843) . C. R. Acad. Sci. 16(21):1157.

TYPE LOCALITY: Brazil, Amazonas, Rio Madeira, Humaitu .

DISTRIBUTION: S Brazil: Amazonas, Parâ, Rondonia, probably Mato Grosso del Norte.

STATUS: CITES - Appendix II. Status uncertain.

SYNONYMS: madeirae Thomas, 1908 .