1. Department of Paleobiology, National Museum of Natural History, Washington, DC, USA
2. Department of Biological Sciences, Mount Holyoke College, South Hadley, MA, USA
3. Department of Earth and Environmental Science, University of Michigan - Ann Arbor, Ann Arbor, MI, USA
4. Department of Marine Biology, Texas A&M University - Galveston, Galveston, TX, USA
5. Department of Paleontology and Geology, Burke Museum of Natural History and Culture, Seattle, WA, USA