1. School of Earth Sciences, University of Bristol, Bristol, UK
2. National Evolutionary Synthesis Center, Durham, NC, USA
3. Department of Paleobiology, Smithsonian Institution, Washington DC, USA
4. John D. Cooper Archaeological and Paleontological Center, Department of Geological Sciences, California State University, Fullerton, CA, USA
5. Department of Geosciences, University of Fribourg/Freiburg, Switzerland
6. Denver Museum of Nature and Science, Denver, CO, USA