1. Department of Geology; University of Liège; allée du 6 Août B18-B20 4000 Liège Belgium
2. Department of Paleontology; Royal Belgian Institute of Natural Sciences; rue Vautier 29 1000 Bruxelles Belgium
3. Paleontological Institute; Shenyang Normal University; 253 North Huanghe Street Shenyang 110034 China
4. Key Laboratory of Vegetation Ecology; Ministry of Education; Northeast Normal University; 5268 Renmin Street Changchun 130024 China
5. Eldonia; 9 avenue des Portes Occitanes 3800 Gannat France
6. Ocean and Earth Science, National Oceanography Centre; University of Southampton; Southampton SO14 3ZH UK