ACKNOWLEDGMENTS

We would like to thank M.J. Adkins and T. Penkrot, for assistance in specimen scanning and modeling and C. Xue for database and website development. We also acknowledge D. Neff for his immense help in establishment and operational training of the laser scanner and accompanying software. We thank P. Holroyd (University of California Museum of Paleontology) for use of specimens in this project. We also thank two anonymous reviewers for insightful comments that improved this manuscript. This project was funded by the National Science Foundation (DEB - Biotic Surveys & Inventories 020828; DBI - Biological Databases and Informatics 0543414), Marshall University, and NASA.