File:Pachycephalosaurus ontogeny skulls - Museum of the Rockies - 2013-07-08.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	19:03, 6 August 2013		3,000 × 2,644 (5.11 MB)	commons>Tim1965	{{Information \|Description ={{en\|1=Three Pacycephalosaurus skulls, showing the development from juvenile to adult, at the Museum of the Rockies in Bozeman, Montana. In the lower right is the mis-named Dracorex -- once thought to be a genus of the P...

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