Hylobates muelleri Martin, 1841 . Nat. Hist. Mamm. Anim., p. 444.

TYPE LOCALITY: Indonesia, Kalimantan, "Southeast Borneo."

DISTRIBUTION: Borneo from the N. bank of the Kapuas River clockwise around the island to the E. bank of the Barito River.

COMMENT: Probably conspecific with lar (CPG) . Type locality restricted by Lyon, 1911, Proc. U.S. Nat. Mus., 40: 142.

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