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Research Article

New Basal Iguanodonts from the Cedar Mountain Formation of Utah and the Evolution of Thumb-Spiked Dinosaurs

  • Andrew T. McDonald mail,

    mcandr@sas.upenn.edu

    Affiliation: Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

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  • James I. Kirkland,

    Affiliation: Utah Geological Survey, Salt Lake City, Utah, United States of America

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  • Donald D. DeBlieux,

    Affiliation: Utah Geological Survey, Salt Lake City, Utah, United States of America

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  • Scott K. Madsen,

    Affiliation: Utah Geological Survey, Salt Lake City, Utah, United States of America

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  • Jennifer Cavin,

    Affiliation: John Day Fossil Beds National Monument, Kimberly, Oregon, United States of America

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  • Andrew R. C. Milner,

    Affiliation: St. George Dinosaur Discovery Site at Johnson Farm, St. George, Utah, United States of America

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  • Lukas Panzarin

    Affiliation: Naturalist Illustrator, Torre di Mosto, Venice, Italy

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  • Published: November 22, 2010
  • DOI: 10.1371/journal.pone.0014075
  • Featured in PLOS Collections

About the Authors

Andrew T. McDonald
Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
James I. Kirkland, Donald D. DeBlieux, Scott K. Madsen
Utah Geological Survey, Salt Lake City, Utah, United States of America
Jennifer Cavin
John Day Fossil Beds National Monument, Kimberly, Oregon, United States of America
Andrew R. C. Milner
St. George Dinosaur Discovery Site at Johnson Farm, St. George, Utah, United States of America
Lukas Panzarin
Naturalist Illustrator, Torre di Mosto, Venice, Italy

Corresponding Author

Email: mcandr@sas.upenn.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ATM JK. Performed the experiments: ATM. Analyzed the data: ATM. Contributed reagents/materials/analysis tools: ATM JK DD SM JC AM. Wrote the paper: ATM. Created life restorations of the new species: LP.