1. Department of Mechanical Engineering, University College London, Torrington Place, WC1E 7JE, London, UK;
2. Centre de Recherche en Paléontologie-Paris (CR2P), UMR 7207, Muséum national d’Histoire naturelle, SU, CNRS, 43 rue Buffon, 75005 Paris, France;
3. Institut de Systématique, Evolution, Biodiversité (ISYEB), UMR 7205, CNRS, Muséum national d’Histoire naturelle, SU, EPHE, UA, CP 50, 75005 Paris, France;
4. School of Earth Sciences, University of Bristol, Bristol, BS8 1TQ, UK;
5. Department of Invertebrate Paleontology, American Museum of Natural History, NY 10024, USA;
6. Département AVIV, UMR CNRS 7179 MECADEV, CNRS/MNHN, 55 rue Buffon, 75005 Paris, France;