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Research Article

Extreme Cranial Ontogeny in the Upper Cretaceous Dinosaur Pachycephalosaurus

  • John R. Horner mail,

    jhorner@montana.edu

    Affiliation: Museum of the Rockies, Montana State University, Bozeman, Montana, United States of America

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  • Mark B. Goodwin

    Affiliation: Museum of Paleontology, University of California, Berkeley, California, United States of America

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  • Published: October 27, 2009
  • DOI: 10.1371/journal.pone.0007626
  • Featured in PLOS Collections

About the Authors

John R. Horner
Museum of the Rockies, Montana State University, Bozeman, Montana, United States of America
Mark B. Goodwin
Museum of Paleontology, University of California, Berkeley, California, United States of America

Corresponding Author

Email: jhorner@montana.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JH MBG. Performed the experiments: JH MBG. Analyzed the data: JH MBG. Contributed reagents/materials/analysis tools: JH MBG. Wrote the paper: JH MBG.