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New data on the ceratopsian dinosaur Pentaceratops sternbergii Osborn from New Mexico

Published online by Cambridge University Press:  20 May 2016

Thomas M. Lehman
Thomas M. Lehman*
Affiliation:
Department of Geosciences, Texas Tech University, Lubbock 79409
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Abstract

Several heretofore undescribed fragmentary specimens of the horned dinosaur Pentaceratops sternbergii (Ornithischia: Ceratopsia) reveal previously unknown features of the skull and extend the known range of morphological variation in this species. Pentaceratops sternbergii possesses a well-developed postfrontal fontanelle and a braincase structure similar to that of other chasmosaurines. The posterior parietal margin bears a pair of upturned epoccipitals on either side of the midline, similar to the short hook-like processes in Anchiceratops. The stratigraphic range of Pentaceratops spans the Late Campanian to Early Maastrichtian but, contrary to previous reports, cannot reliably be extended into the Late Maastrichtian.

Type
Research Article
Information
Journal of Paleontology , Volume 67 , Issue 2 , March 1993 , pp. 279 - 288
Copyright
Copyright © The Paleontological Society 

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