Order Primates Author Colin P. Groves text 1993 Smithsonian Institution Press Washington and London Editor Don E. Wilson Editor DeeAnn M. Reeder Mammal Species of the World (2 nd Edition) 243 277 book chapter 193461 10.5281/zenodo.7353122 0df816bd-0cef-463a-94c2-b03e13ea7128 1-56098-217-9 7353122 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 .