SIA3646: Pachycephalosaurus wyomingensis

SIA3646
Photographer:Calvin J. Hamilton
Copyright:© 2010 Calvin J. Hamilton
Date:2005/03/22
Date Added:2010/03/30
Location:Niobrara County, Wyoming

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Caption

This Pachycephalosaurus wyomingensis dates to the Late Cretaceous period, 75-65 million years ago.

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