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Mantled Howler Monkey, Panama (USNM 257404)

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 ( houses many New World monkeys in its scientific collections. 

This specimen, USNM 257404 (, is a mantled howler monkey (Alouatta palliata) from Panama. This individual was collected in 1932 by R. K. Enders near Gatun, located in the Canal Zone.

This is a CT scan of the mandible of USNM 257404. 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 (, and the Smithsonian Collections Care and Preservation Fund.

The main goal of this joint initiative between the Human Origins Program and the Division of Mammals is to make the NMNH's scientific collections of our closest living nonhuman primate relatives available in 3D for education and research.