1. Museum of Comparative Zoology and Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.
2. Integrative Research Center, Field Museum of Natural History, Chicago, IL 60605, USA.
3. Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, IN 47405, USA.
4. Department of Zoology and University Museum of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK.
5. European Synchrotron Radiation Facility, 38000 Grenoble, France.
6. Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL 60637, USA.
7. Department of Geophysical Sciences, University of Chicago, Chicago, IL 60637, USA.