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Notes on pachycephalosaurs (Ornithischia)

Published online by Cambridge University Press:  19 May 2016

Emily B. Giffin
Emily B. Giffin*
Affiliation:
Department of Geosciences, University of Wisconsin-Milwaukee, Milwaukee 53201
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Abstract

Previously undescribed specimens of Pachycephalosaurus wyomingensis allow partial description of the anterior braincase and a preliminary examination of change of dome shape with age. The two morphs of dome shape recognized in adults are also present in juvenile specimens with dome lengths half that of mature adults. A new specimen of Stegoceras edmontonense in the same geographic and stratigraphic provenance as P. wyomingensis establishes that the two pachycephalosaur genera could exist sympatrically.

Type
Research Article
Information
Journal of Paleontology , Volume 63 , Issue 4 , July 1989 , pp. 525 - 529
Copyright
Copyright © The Paleontological Society 

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