1. State Key Laboratory of Systematic and Evolutionary Botany; Institute of Botany, Chinese Academy of Sciences; Beijing 100093 China
2. Centre for Earth, Planetary, Space and Astronomical Research; The Open University; Milton Keynes MK7 6AA UK
3. Department of Geoscience; Hobart and William Smith Colleges; Geneva NY 14456 USA
4. Key Laboratory of Tropical Forest Ecology; Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences; Mengla 666303 Yunnan China
5. GNS Science /Te Pu Ao; PO Box 30,368 Lower Hutt 5040 New Zealand
6. Geological Institute, Russian Academy of Sciences; 7 Pyzhevskii Pereulok 119017 Moscow Russia
7. Department of Earth Sciences; Natural History Museum; Cromwell Road London SW7 5BD UK
8. Birbal Sahni Institute of Palaeobotany; 53 University Road Lucknow 226007 India
9. School of Geographical Sciences; University of Bristol; University Road Bristol BS8 1SS UK
10. Key Laboratory of Biodiversity and Biogeography; Kunming Institute of Botany, Chinese Academy of Sciences; Kunming 650204 China
11. State Key Laboratory of Vegetation and Environmental Change; Institute of Botany, Chinese Academy of Sciences; Beijing 100093 China