Hylobates syndactylus (Raffles, 1821) . Trans. Linn. Soc. London, 13:241.

TYPE LOCALITY: Indonesia, W Sumatra, Bengkeulen .

DISTRIBUTION: Barisan Mountains of Sumatra (Indonesia); mountains of Malay Peninsula south of Perak River.

STATUS: CITES - Appendix I; U.S. ESA - Endangered.

SYNONYMS: continentis, gibbon, subfossilis, volzi.

COMMENTS: Type species of subgenus Symphalangus; see Groves (1972b).