1. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.
2. Department of Earth and Space Sciences, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA.
3. Steinmann-Institut für Geologie Mineralogie und Paläontologie, Universität Bonn, Poppelsdorfer Schloss, 53115 Bonn, Germany.
4. Department of Atmospheric and Oceanic Sciences, Institute of Geophysics and Planetary Physics, Institute of the Environment and Sustainability, UCLA, Los Angeles, CA 90095, USA.
5. Department of Geology, Colorado College, Colorado Springs, CO 80903, USA.
6. Tate Geological Museum, Casper College, Casper, WY 82601, USA.
7. Oklahoma Museum of Natural History and Department of Zoology, University of Oklahoma, Norman, OK 73019, USA.