1. Institut für Biologie, Freie Universität Berlin, Berlin, Germany
2. Institute of Geology, Leibniz University Hannover, Hannover, Germany
3. Geological Survey of Canada (Atlantic), Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada
4. Department of Earth Sciences, Brock University, St. Catharines, Ontario, Canada
5. Chicago Botanic Garden, Glencoe, Illinois, USA
6. British Geological Survey, Keyworth, Nottingham, UK
7. Botanischer Garten und Botanisches Museum Berlin, Freie Universität Berlin, Berlin, Germany