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Sykes' Monkey, Kenya (USNM 452574)
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 (http://vertebrates.si.edu/mammals/) houses many Old World monkeys in its scientific collections.
This specimen, USNM 452574 (http://collections.nmnh.si.edu/search/mammals/?irn=7340349), is a male Sykes’ monkey (Cercopithecus albogularis kolbi) from Kenya. This individual was collected in 1962 by C. P. Booth near Kinangop located in the Central Province. This specimen weighed 7,550 g, measured 1,237 mm in total length and 656 mm in tail length. The hind tarsus measured 159 mm, an ear notch length of 40 mm and a head to body length of 581 mm.
This is a CT scan of the cranium of USNM 452574. 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 (http://smithsonian20.si.edu/fund.html), and the Smithsonian Collections Care and Preservation Fund.