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Tufted Gray Langur, Sri Lanka (USNM 122173)
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 122173 (http://collections.mnh.si.edu/search/mammals/?irn=7245732), is a female Tufted Gray langur (Semnopithecus priam thersites) collected by B. Geisler from Sri Lanka.
This is a CT scan of the cranium of USNM 122173. 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.