About the Authors
- Mark A. Loewen, Randall B. Irmis, Scott D. Sampson
- Natural History Museum of Utah and Department of Geology & Geophysics, University of Utah, Salt Lake City, Utah, United States of America
- Joseph J. W. Sertich, Scott D. Sampson
- Department of Earth Sciences, Denver Museum of Nature & Science, Denver, Colorado, United States of America
- Philip J. Currie
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
The authors have declared that no competing interests exist.
Conceived and designed the experiments: MAL. Performed the experiments: MAL RBI JJWS PJC SDS. Analyzed the data: MAL RBI JJWS PJC SDS. Wrote the paper: MAL RBI JJWS. Scored characters for taxa in the phylogenetic analysis: MAL RBI JJWS. Conducted the biogeographic analysis: MAL RBI.