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This is one of two images currently available of a mysterious primate skull found yesterday just outside Dallas. I am waiting to see how long it will be before someone leaps upon it with glee, proclaiming it to be the skull of bigfoot.

It's not, because, although there is nothing in this picture for scale, the video embedded at http://www.nbcdfw.com:80/news/local/Its-a-Skull-But-What-Kind.html shows that it fits comfortably on the palm of the hand of the geezer who found it. It will, however, be interesting to see how the story unfoldS.
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It looks like a skull belonging to some species of macaque or baboon.

Skull of a Rhesus macaque: http://www.boneclones.com/images/bc137_web-lg.jpg

West Texas even had its own feral population of Japanese macaques.

http://www.austinchronicle.com/gyrobase/Issue/story?oid=oid:283057
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Looks like a gorilla skull, and not a very old one at that. Maybe from a late 19th, early 20th century circus?