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Mantled Howler Monkey, Mexico (USNM 79400)
New World monkeys are primates and are more closely related to humans, apes and Old World monkeys than any other living nonhuman primate group. The Smithsonian Institution’s Division of Mammals (http://vertebrates.si.edu/mammals/) houses many New World monkeys in its scientific collections.
This specimen, USNM 79400 (http://collections.nmnh.si.edu/search/mammals/?irn=7235149), is a female mantled howler monkey (Alouatta palliata) from Mexico. This individual was collected by Nelson and Goldman in 1896 near Minatitlan in Veracruz.
This is a CT scan of the mandible of USNM 79400. 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.