Subspecies and Distribution. 1. c. cnistatus Raffles, 1821 — Borneo, Sumatra, Bangka, Belitung, and Riau (Bintan, Combol, Sugi, and perhaps Batam) and Lingga (Bakung, Lingga) Archipelagos, off E Sumatra. 1: c. vigilans G. S. Miller, 1913 — Natuna Is (Serasan I), off W Borneo. in Cercopithecidae

Subspecies and Distribution. 1. c. cnistatus Raffles, 1821 — Borneo, Sumatra, Bangka, Belitung, and Riau (Bintan, Combol, Sugi, and perhaps Batam) and Lingga (Bakung, Lingga) Archipelagos, off E Sumatra. 1: c. vigilans G. S. Miller, 1913 — Natuna Is (Serasan I), off W Borneo.Published as part of Russell A. Mittermeier, Anthony B. Rylands & Don E. Wilson, 2013, Cercopithecidae, pp. 550-755 in Handbook of the Mammals of the World – Volume 3 Primates, Barcelona :Lynx Edicions on page 743, DOI: 10.5281/zenodo.686706