Pachycephalosaurs (IMAGE)

University of California - Berkeley

Pachycephalosaurs

Caption

Dracorex (upper left) and Stygimoloch (upper right) are not distinct dome-headed dinosaurs, but young and nearly sexually mature, respectively, members of the species Pachycephalosaurus wyomingensis, according to a new study by paleontologists from UC Berkeley and the Museum of the Rockies

Credit

Holly Woodward/Montana State University

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