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Research Article

First Evidence of Dinosaurian Secondary Cartilage in the Post-Hatching Skull of Hypacrosaurus stebingeri (Dinosauria, Ornithischia)

  • Alida M. Bailleul mail,

    alida.bailleul@msu.montana.edu

    Affiliations: Museum of the Rockies, Montana State University, Bozeman, Montana, United States of America, Department of Earth Sciences, Montana State University, Bozeman, Montana, United States of America

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  • Brian K. Hall,

    Affiliation: Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada

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  • John R. Horner

    Affiliations: Museum of the Rockies, Montana State University, Bozeman, Montana, United States of America, Department of Earth Sciences, Montana State University, Bozeman, Montana, United States of America

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  • Published: April 30, 2012
  • DOI: 10.1371/journal.pone.0036112
  • Published in PLOS ONE

About the Authors

Alida M. Bailleul, John R. Horner
Museum of the Rockies, Montana State University, Bozeman, Montana, United States of America
Alida M. Bailleul, John R. Horner
Department of Earth Sciences, Montana State University, Bozeman, Montana, United States of America
Brian K. Hall
Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada

Corresponding Author

Email: alida.bailleul@msu.montana.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AMB BKH JRH. Performed the experiments: AMB JRH. Analyzed the data: AMB BKH JRH. Wrote the paper: AMB BKH. Commented on the manuscript: JRH.