Article (Scientific journals)
New data on the palaeobiogeography of Early Jurassic marine reptiles: the Toarcian ichthyosaur fauna of the Vocontian Basin (SE France)
Fischer, Valentin; Guiomar, Myette; Godefroit, Pascal
2011In Neues Jahrbuch für Geologie und Palaontologie. Abhandlungen, 261 (1), p. 111-127
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Keywords :
Ichthyosauria; Suevoleviathan; Palaeobiogeography; Toarcian; Vocontian Basin; Southeastern France
Abstract :
[en] The Vocontian Basin (SE France) was formed along the northwestern border of Tethys during Mesozoic times. Mainly known for its rich ammonite fauna, this basin has also yielded several Lower Jurassic ichthyosaurs. The specimens discussed here were discovered in lower Toarcian limestone and marl successions in the vicinity of Digne-les-Bains, High-Provence Alps. The best-preserved specimen is identified as Suevoleviathan sp., a rare taxon previously reported only in southern Germany. Along with this specimen, premaxillae and paddle elements of Eurhinosaurus sp. and probable Stenopterygiidae centra were found in neighbouring localities. These specimens were preserved thanks to the deposition of soft anoxic marls or calcarodetritic sediments, coeval with other anoxic shales in Europe (the Toarcian Oceanic Anoxic Event or T-OAE), which allows faunal comparisons between these basins. The localities from the Vocontian Basin are closer to the Tethys than any other sites where identifiable Toarcian ichthyosaurs have been found in Europe. Nevertheless, the Vocontian ichthyosaur assemblage is strikingly similar to those in other basins across Europe. It suggests that Toarcian ichthyosaurs had a wide palaeobiogeographical distribution, reflecting their anatomical adaptations as highly mobile swimmers.
Research center :
Palaeontology
Disciplines :
Earth sciences & physical geography
Author, co-author :
Fischer, Valentin  ;  Université de Liège - ULiège > Département de géologie > Paléontologie animale et humaine
Guiomar, Myette;  Réserve naturelle Géologique de Haute-Provence
Godefroit, Pascal;  Institut Royal des Sciences Naturelles de Belgique > Palaeontology
Language :
English
Title :
New data on the palaeobiogeography of Early Jurassic marine reptiles: the Toarcian ichthyosaur fauna of the Vocontian Basin (SE France)
Publication date :
2011
Journal title :
Neues Jahrbuch für Geologie und Palaontologie. Abhandlungen
ISSN :
0077-7749
Publisher :
E. Schweizerbart'sche Verlagsbuchhandlung, Germany
Volume :
261
Issue :
1
Pages :
111-127
Peer reviewed :
Peer reviewed
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Commentary :
Fast track article
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since 23 April 2011

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