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Extra resources for 8th International Symposium Cephalopods – Present and Past, August 30 – September 3, 2010, University of Burgundy & CNRS, Dijon – France. Abstracts Volume

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Correlation, 14, 399-417. 8th International Symposium, Cephalopods – Present and Past (Dijon – France 2010) 34 Ammonite, inoceramid and nannofossil biostratigraphy across the Turonian–Coniacian boundary in the Aquitaine and Vocontian basins (France) and Diego Basin (Madagascar) Frédéric Diebold1, Peter Bengtson1, Jackie A. Lees2 & Ireneusz Walaszczyk3 1 Institut für Geowissenschaften, Ruprecht-Karls-Universität, Im Neuenheimer Feld 234, 69120 Heidelberg, Germany 2 Department of Earth Sciences, University College London, Gower Street, London WC1E 6BT, United Kingdom 3 Faculty of Geology, University of Warsaw, Al.

However, before this formal definition of the boundary, the level of its FA in Mexico was in the Maastrichtian. Sphenodiscids dispersed and radiated during the latest Campanian and Maastrichtian, until they went extinct at or near the Cretaceous– Palaeogene boundary. There is evidence for migration pathways of S. lobatus and S. pleurisepta in North America which results from precise dating of many occurrences throughout this continent. During the latest Campanian and early Maastrichtian, the two species immigrated to North America from the South; they did not evolve on this continent.

This index is considered in two ways. First, we computed separately the Moran’s I for various levels of the phylogenetic hierarchy. Second, we computed the Moran’s I with overall phylogenetic distances among species, thus yielding a single value for the entire phylogenetic tree. Our first results show that most extinctions were significantly clustered, suggesting a strong signal from extinction-prone clades. We are also currently quantifying the phylogenetic structures of ammonite assemblages in order to test their response to paleoenvironmental and paleogeographic changes.

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8th International Symposium Cephalopods – Present and Past, August 30 – September 3, 2010, University of Burgundy & CNRS, Dijon – France. Abstracts Volume


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