1. Fossil Reptiles, Amphibians and Birds Section, Natural History Museum, Cromwell Road, London SW7 5BD, UK
2. Department of Earth Sciences, University College London, Gower Street, London, WC1E 6BT, UK
3. Lansdowne, Military Road, Chale, Isle of Wight, PO38 2HH, UK
4. Fayetteville, 72701, AR, USA