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Palaeobiogeography of Ordovician echinoderms

By
Bertrand Lefebvre
Bertrand Lefebvre
UMR CNRS 5276, Université Lyon 1 & ENS-Lyon, F-69622 Villeurbanne, France
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Colin D. Sumrall
Colin D. Sumrall
Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996, USA
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Rene A. Shroat-Lewis
Rene A. Shroat-Lewis
Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996, USA
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Mike Reich
Mike Reich
Geowissenschaftliches Zentrum der Georg-August-Universität Göttingen, Goldschmidtstr. 1-5, D-37077 Göttingen, Germany
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Gary D. Webster
Gary D. Webster
School of Earth and Environmental Sciences, Washington State University, Pullman, WA 99164-2812, USA
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Aaron W. Hunter
Aaron W. Hunter
Geowissenschaftliches Zentrum der Georg-August-Universität Göttingen, Goldschmidtstr. 1-5, D-37077 Göttingen, GermanyFacility of Geosciences and Petroleum Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia
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Elise Nardin
Elise Nardin
UMR CNRS 5563 Géosciences Environnement Toulouse, Observatoire Midi-Pyrénées, F-31400 Toulouse, France
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Sergei V. Rozhnov
Sergei V. Rozhnov
Paleontological Institute RAS, 117997 Moscow, Russia
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Thomas E. Guensburg
Thomas E. Guensburg
Physical Science Division, Rock Valley College, Rockford, IL 61114, USA
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Alexandra Touzeau
Alexandra Touzeau
UMR CNRS 5276, Université Lyon 1 & ENS-Lyon, F-69622 Villeurbanne, France
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Fleur Noailles
Fleur Noailles
Department of Earth Sciences, University of Bristol, Bristol BS8 1RJ, UK
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James Sprinkle
James Sprinkle
Department of Geological Sciences, Jackson School of Geosciences, University of Texas, Austin, TX 78712-0254, USA
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Published:
January 01, 2013

Abstract

The palaeobiogeographical distribution of the six major clades of Ordovician echinoderms (asterozoans, blastozoans, crinoids, echinozoans, edrioasteroids and stylophorans) is analysed based on a comprehensive and up-to-date database compiling 3701 occurrences (1938 species recorded from 331 localities) of both complete specimens and isolated ossicles. Although historically biased towards a limited number of regions (Europe, North America, Russia), the resulting dataset makes it possible to identify six main palaeobiogeographical provinces for Ordovician echinoderms: Laurentia, Baltica, West Gondwana, East Gondwana, Avalonia and Siberia. At a global scale, the high endemicity of echinoderms during the Early to Middle Ordovician coincides with the time of maximum dispersal of continental masses. Late Ordovician faunas tend to become more cosmopolitan, possibly as a consequence of changing palaeogeography and/or relatively higher sea-levels in the Sandbian–Katian interval. Regional biodiversity patterns of Ordovician echinoderms confirm that their major diversification during the Ordovician is not a single, universal evolutionary event, but rather results from the complex addition of contrasted local evolutionary trends.

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Contents

Geological Society, London, Memoirs

Early Palaeozoic Biogeography and Palaeogeography

D. A. T. Harper
D. A. T. Harper
Durham University, UK
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T. Servais
T. Servais
CNRS–Université de Lille 1, France
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Geological Society of London
Volume
38
ISBN electronic:
9781862396425
Publication date:
January 01, 2013

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