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A review of Ordovician crinoids from France: New data from the Darriwilian of the Armorican Massif and palaeobiogeographic implications

Abstract : All known occurrences of crinoids in the Ordovician of France (Armorican Massif, Montagne Noire, Corbières and Pyrénées) are reviewed and replaced stratigraphically. Fully articulated crinoids are described for the first time in the Darriwilian (Middle Ordovician) of the Armorican Massif. The disparid crinoid Heviacrinus melendezi is reported from the middle and late Darriwilian (artus and teretiusculus zones) of both Brittany and Normandy, which extends both its geographic distribution and its temporal range. In addition, a new species of Heviacrinus, H. tromelini is described from the late Darriwilian (teretiusculus zone) of both Brittany and Normandy. Finally, three successive French Ordovician crinoid faunas are identified. They show strong palaeobiogeographic affinities with other Gondwanan and peri-Gondwanan assemblages, and in particular with those of the Mediterranean Province.
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https://hal-insu.archives-ouvertes.fr/insu-01230276
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Submitted on : Wednesday, November 18, 2015 - 11:04:49 AM
Last modification on : Thursday, May 28, 2020 - 8:10:03 PM

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Bertrand Lefebvre, William Ausich, Sébastien Clausen, Philippe Courville, Jean-Paul Kundura, et al.. A review of Ordovician crinoids from France: New data from the Darriwilian of the Armorican Massif and palaeobiogeographic implications. Annales de Paléontologie, Elsevier Masson, 2015, 101 (4), pp.301-313. ⟨10.1016/j.annpal.2015.10.004⟩. ⟨insu-01230276⟩

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