Research Article

The Origin and Initial Rise of Pelagic Cephalopods in the Ordovician

  • Björn Kröger mail,

    Affiliation: Museum für Naturkunde, Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, Berlin, Germany

  • Thomas Servais,

    Affiliation: Université de Lille 1, UMR 8157 du CNRS Géosystémes, Villeneuve d' Ascq, France

  • Yunbai Zhang

    Affiliation: Nanjing Institute of Geology and Paleontology, Nanjing, China

  • Published: September 30, 2009
  • DOI: 10.1371/journal.pone.0007262

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