1. Bristol Palaeobiology Group, School of Earth Sciences University of Bristol Life Sciences Building, 24 Tyndall Avenue Bristol BS8 4QQ UK
2. Department of Earth & Environmental Sciences The University of Manchester Manchester M13 9PL UK
3. Natural History Museum London SW7 5BD UK
4. Trofimuk Institute of Petroleum Geology & Geophysics Koptyug Avenue 3 Novosibirsk 630090 Russia
5. Department of Earth Sciences University of Oxford South Parks Road Oxford OX1 3AN UK
6. Department of Earth Sciences University of Cambridge Downing Street Cambridge CB2 3EQ UK