Golden-backed squirrel monkey (<i>Saimiri ustus</i>). Yellow or orange color in forearms does'n extend above the wrists.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/nostri-imago/">Cliff</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/nostri-imago/2952718387/">Flickr</a>