Hylobates agilis F. Cuvier, 1821 . In É. Geoffroy and F. Cuvier, Hist. Nat. Mammifères, pt. 2, 3(32):1 -3, "Wouwou".

TYPE LOCALITY: Indonesia, W Sumatra .

DISTRIBUTION: Malay Peninsula from the Mudah and Thepha rivers on the north to the Perak and Kelanton rivers on the south; Sumatra (Indonesia), SE of Lake Toba and the Singkil River; Kalimantan (Indonesian Borneo) between the Kapuas and Barito rivers.

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

SYNONYMS: albibarbis, ablogriseus, albonigrescens, rafflei, unko .

COMMENTS: Subgenus Hylobates . Not a subspecies of lar . May include muelleri as a subspecies; or albibarbis (here recognized as a subspecies of agilis) may be a subspecies of muelleri .