| Author: | Waterhouse, 1838. |
| Citation: | Proc. Zool. Soc. Lond., 1838: 59. |
| Common Name: | Red-eared Guenon |
| Type Locality: | Equatorial Guinea, Bioko. |
| Distribution: | S and E Nigeria, Cameroon coast, Bioko. |
| Status: | CITES – Appendix II; U.S. ESA – Endangered; IUCN – Endangered as C. c. erythrotis, otherwise Vulnerable. |
| Comments: | C. cephus species group. Considered a subspecies of cephus by Struhsaker (1970:374-376); but also see Dandelot (1974:23). McAllan and Bruce (1989) argued that the original publication of this species should be: The Analyst, 24:298-299 [publ. 2 July 1838]. |
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