Nasalis concolor Miller, 1903 . Smithson. Mise. Coll., 45:67.

TYPE LOCALITY: Indonesia, W. Sumatra, S. Pagai Isl .

DISTRIBUTION: Mentawi Isis.

COMMENT: Type species of Simias (Miller, 1903) which was considered a subgenus by Delson, 1975, Contrib. Primatol., 5: 217.

PROTECTED STATUS: CITES - Appendix I as Simias concolor and U.S. ESA - Endangered as Nasalis (= Simias) concolor .

ISIS NUMBER: 5301406008012001001 as Simias concolor .