1. Department of Geology; Tallinn University of Technology; Tallinn 19086 Estonia
2. CAS Key Laboratory of Economic Stratigraphy and Palaeogeography; Nanjing Institute of Geology and Palaeontology; Chinese Academy of Sciences; Nanjing 210008 China
3. Evo-Eco-Paléo; UMR 8198 du CNRS; Université de Lille; F-59655 Villeneuve d'Ascq France
4. State Key Laboratory of Palaeobiology and Stratigraphy; Nanjing Institute of Geology and Palaeontology; Chinese Academy of Sciences; Nanjing 210008 China