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Milne-Edwards' Sifaka, Madagascar (USNM 63353)
Lemurs are primates and are more closely related to humans, apes and monkeys than any other living nonhuman primate group. The Smithsonian Institution’s Division of Mammals (http://vertebrates.si.edu/mammals/) houses many lemurs in its scientific collections.
This specimen, USNM 63353 (http://collections.nmnh.si.edu/search/mammals/?irn=7232018), is a male Milne-Edwards’ sifaka (Propithecus edwardsi) from Madagascar. This individual was collected in 1895 by William Abbott in the Faraony River Valley, Fianarantsoa Province. This specimen weighed 4.8 kg, measured a total length of 914 mm, a tail length of 406 mm, and a head to body length of 508 mm.
This is a CT scan of the mandible of USNM 63353. 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.