Subspecies and Distribution. C.e.erythrotisWaterhouse,1838—mountainousareasinC&SBiokoI(EquatorialGuinea). C. e. camerunensis Hayman, 1940 — SE Nigeria (E of lower Cross River) and NW Cameroon (N of lower Sanaga River), also in a small areajust S of the Sanaga River, near its mouth, between Tinaso and Lake Tisongo. in Cercopithecidae

Subspecies and Distribution. C.e.erythrotisWaterhouse,1838—mountainousareasinC&SBiokoI(EquatorialGuinea). C. e. camerunensis Hayman, 1940 — SE Nigeria (E of lower Cross River) and NW Cameroon (N of lower Sanaga River), also in a small areajust S of the Sanaga River, near its mouth, between Tinaso and Lake Tisongo.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 689, DOI: 10.5281/zenodo.686706