1. Conservation and Survey Division, School of Natural Resources; and Department of Earth and Atmospheric Sciences, 615 Hardin Hall, University of Nebraska–Lincoln, Lincoln, NB 68583-0996, USA
2. Kansas Geological Survey, 1930 Constant Avenue, Lawrence, KS 66047-3724, USA
3. Department of Geology, Ritchie Hall, Earth, Energy and Environment Center, University of Kansas, Lawrence, KS 66045-7575, USA
4. National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD 20892, USA
5. Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA
6. Department of Geosciences, Gearhart Hall, University of Arkansas, Fayetteville, AK 72701, USA
7. Department for Geodynamics and Sedimentology, University of Vienna, UZA II, Althanstrasse 14, 1090 Vienna, Austria
8. Sam Noble Oklahoma Museum of Natural History, 2401 Chautauqua Avenue Norman, OK 73072-7029, USA
9. Utah Geological Survey, 1594 W. North Temple, PO Box 146100, Salt Lake City, UT 84114-6100, USA