Hylobates klossii (Miller, 1903) . Smithson. Mise. Coll., 45:70.

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

DISTRIBUTION: Mentawi Isis, (off W. Sumatra).

PROTECTED STATUS: CITES - Appendix I as Hylobates spp. and U.S. ESA - Endangered as Hylobates spp. (including Nomascus spp.).

ISIS NUMBER: 5301406009001004001.