About the Authors

Paulyn Cartwright

Affiliation Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, Kansas, United States of America

Susan L. Halgedahl

Affiliation Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, United States of America

Jonathan R. Hendricks

Affiliation Department of Geology, and Division of Invertebrate Paleontology, Natural History Museum, University of Kansas, Lawrence, Kansas, United States of America

Richard D. Jarrard

Affiliation Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, United States of America

Antonio C. Marques

Affiliation Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, São Paulo, Brazil

Allen G. Collins

Affiliation National Systematics Laboratory of NOAA Fisheries Service, National Museum of Natural History, Smithsonian Institution, Washington, D. C., United States of America

Bruce S. Lieberman

To whom correspondence should be addressed. E-mail: blieber@ku.edu

Affiliation Department of Geology, and Division of Invertebrate Paleontology, Natural History Museum, University of Kansas, Lawrence, Kansas, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PC BL JH SH RJ AM AC. Analyzed the data: PC BL JH SH RJ AM AC. Wrote the paper: PC BL JH SH RJ AM AC.