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Coiba Island Howler Monkey, Mexico (USNM 292172)
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 292172 (http://collections.nmnh.si.edu/search/mammals/?irn=7302266), is a female Coiba Island howler monkey (Alouatta pigra) from Mexico. This individual was collected in 1951 by H. C. Clark near Palenque, located in the Chiapas of southern Mexico.
This is a CT scan of the cranium of USNM 292172. 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.