1. UMR 8217 Géosystèmes, CNRS-Université de Lille 1, Cité Scientifique, 59655 Villeneuve d'Ascq, France;
2. Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, East Beijing Road, 210008 Nanjing, P.R. China; ,
3. British Geological Survey, Keyworth, Nottingham NG12 5GG, UK;
4. IANIGLA, CCT – CONICET – Mendoza, C.C, 131 5500 Mendoza, Argentina;
5. Saudi Aramco, Biostratigraphy Group, Geological Technical Services Division, EXPEC 2 Building, Dhahran 31311, Saudi Arabia;
6. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing 210008, P.R. China