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 muelleri Martin, 1841 . Nat. Hist. Mamm. Anim., p. 444 . TYPE LOCALITY: Indonesia , Kalimantan , "Southeast Borneo"; restricted by Lyon (1911:142) . DISTRIBUTION: Borneo from the N bank of the Kapuas River clockwise around the island to the E bank of the Barito River . STATUS: CITES - Appendix I; U.S. ESA - Endangered. SYNONYMS: abbotti , funereus . COMMENTS: Subgenus Hylobates . May be conspecific with H. agilis ; a wide intergrade zone with H. agilis albibarbis in Borneo ( Marshall and Sugardjito, 1986 ) .