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Gibbon, Indonesia (USNM 143566)
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 143566 (http://collections.mnh.si.edu/search/mammals/?irn=7251553), is an elderly adult male Sumatran Lar gibbon (Hylobates lar vestitus) from Indonesia. This individual was collected by William Abbott in 1905 near Aru Bay on the island of Sumatra. The specimen weighed 9.5 lbs and a head to body length of 450 mm.
This is a CT scan of the cranium of USNM 143566. 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.