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

TYPE LOCALITY: Indonesia, W. Sumatra, Bengkeulen .

DISTRIBUTION: Barisan Mountains of Sumatra; mountains of Malay Peninsula S. of Perak River.

COMMENT: Type species of Symphalangus; see Groves, 1972, in Rumbaugh, ed., Gibbon and Siamang, 1: 1-89. CAH considers Symphalangus a distinct genus.

PROTECTED STATUS: CITES - Appendix 1 as Hylobates spp. and U.S. ESA - Endangered as Hylobates spp. (including Nomascus spp.). CITES - Appendix I and U.S. ESA - Endangered as Symphalangus syndactylus .

ISIS NUMBER: 5301406009001008001.