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Dusty Leaf Monkey, Myanmar (USNM 104446)
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 104446 (http://collections.nmnh.si.edu/search/mammals/?irn=7241014), is a female dusty leaf monkey (Trachypithecus obscurus sanctorum) from Myanmar. This individual was collect in 1900 by William Abbott near Mergui Archipelago on St. Matthew Island. This specimen weighed 18 lbs, had a total length of 1,219 mm, a tail length of 711 mm, and a head to body length of 508 mm. In 1910, D. G. Elliot designated this individual the type specimen Pygathrix sanctorum.
This is a CT scan of the mandible of USNM 104446. 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.