Cercocebus atys lunulatus,[1] now Cercocebus lunulatus, is commonly known as the white-naped, white-headed, or white-necked mangabey (causing confusion with the Collared mangabey).
- This now distinct species is thought to have a geographic range from east of the Sassandra River to west of the Volta River in Ghana.
- White-naped mangabey is also reported as a forest dweller in northeastern Côte d’Ivoire and southwestern Burkina Faso.
- A member of the Cercopithecinae (pocket-cheeked monkeys), white-naped mangabeys are smoky, slate-gray, or brownish-gray monkeys with lighter white on their ventral side.
- It is known for a whorl or Crown on the head, a darker face, a more prominent dorsal stripe, and a black-edged white oval patch on the nape.
- The hands and feet of white-naped mangabeys are more similar in color to the body and have white undersides.
- The mass of these mangabeys ranges from 8.5 to 14 kg for males and 5 to 9 kg for females, with an average of 8, 593 kg.
- The head and body length is 40-60 cm in females and 47-67 cm in males, while the tail length is 40-80 cm in both sexes. The shoulder height is 38-42 cm for females and 40-45 cm for males.
