ABSTRACT
ACKNOWLEDGEMENTS Photography and Illustrations American Museum of Natural History Library: 233, 236. Cristoph Bartels, Deutsches Bergbau-Museum, Bochum:
87, 88, 101, 106, 109. Günter Bechly, Museum für Naturkunde, Stuttgart: 358. Fred Broadhurst, University of Manchester: 138, 139,
141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157.
