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Gibbon, Indonesia (USNM 144091)
Gibbons are apes and one of our closest living relatives. The Smithsonian Institution’s Division of Mammals (http://vertebrates.si.edu/mammals/) houses many gibbons in its scientific collections.
This specimen, USNM 144091 (http://collections.mnh.si.edu/search/mammals/?irn=7251794), is a male agile gibbon (Hylobates agilis) from Indonesia. This individual was collected by William Abbott in 1906 near the Little Siak River on the island of Sumatra. This male weighed 12.5 lbs and had a head to body length of 450 mm.
This is a CT scan of the mandible of USNM 144091. 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.