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Maroon Leaf Monkey, Indonesia (USNM 153790)
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 type specimen, USNM 153790 (http://collections.nmnh.si.edu/search/mammals/?irn=7254985), is a female maroon leaf monkey (Presbytis rubicunda rubida) from Indonesia. This specimen was collected by William Abbott in 1908 near Batu Jurong on the island of Borneo. This individual weighed 17.25 lbs and was designated the type specimen of Presbytis rubicunda rubida by M. W. Lyon in 1911.
This is a CT scan of the mandible of USNM 153790. 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.