Sykes' Monkey, Kenya (USNM 452581)

USNM 452581

Old World monkeys are primates and are more closely related to humans and apes than any other living nonhuman primate group. The Smithsonian Institution’s Division of Mammals ( houses many Old World monkeys in its scientific collections. 

This specimen, USNM 452581 (, is a female Sykes’ monkey (Cercopithecus albogularis kolbi) from Kenya. This individual was collected in 1961 by C. P. Booth near Maguga located in the Central Province. This specimen weighed 4,210 g, measured 1,108 mm in total length and 639 mm in tail length. The hind tarsus measured 143 mm, an ear notch length of 36 mm and a head to body length of 469 mm.

This is a CT scan of the mandible of USNM 452581. These three-dimensional scans are made publicly available through the generous support of the Smithsonian 2.0 Fund, provided from the annual gifts of the Smithsonian National Board to the Secretary to use at his discretion (, and the Smithsonian Collections Care and Preservation Fund.

The main goal of this joint initiative between the Human Origins Program and the Division of Mammals is to make the NMNH's scientific collections of our closest living nonhuman primate relatives available in 3D for education and research.