1. Institute of Marine and Coastal Sciences, Rutgers University, 71 Dudley Road, New Brunswick, NJ 08901, USA.
2. Department of Geological Sciences, Rutgers University, 610 Taylor Road, Piscataway, NJ 08854, USA.
3. Department of Geology and Geophysics, Yale University, New Haven, CT 06520–8109, USA.
4. Division of Paleontology, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024–5192, USA.
5. Department of Anesthesia and Critical Care, Harvard Medical School at Massachusetts General Hospital, Fruit Street, Boston, MA 02114, USA.