Affiliation: | Univ Rennes, CNRS, Géosciences Rennes, UMR 6118, CNRS, F-35000, Rennes, France;Biostratigraphic Associates(UK)Ltd, 17 Woodland Avenue, Norton Green, Stoke on Trent, Staffs, ST6 8NE, UK;Research Station of the Russian Academy of Sciences, Bishkek, Kyrgyzstan |