Hylobates concolor (Harlan, 1826) . J. Acad. Nat. Sei. Phila., ser. 5, 4:231.

TYPE LOCALITY: Vietnam, Tonkin .

DISTRIBUTION: Hainan Isl. (China); E. of the Mekong River in S. Yunnan (China), Laos, Vietnam and Kampuchea, N. to Red River in Vietnam.

COMMENT: Type species of Nomascus which was recognized as a separate genus by Lekagul and McNeely, 1977:308; but see Corbet and Hill, 1980:91, and Szalay and Delson, 1979:461.

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

ISIS NUMBER: 5301406009001002001.