Reference : Ichthyosaurs from the French Rhaetian indicate a severe turnover across the Triassic–...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Life sciences : Zoology
http://hdl.handle.net/2268/172355
Ichthyosaurs from the French Rhaetian indicate a severe turnover across the Triassic–Jurassic boundary
English
Fischer, Valentin mailto [Université de Liège - ULiège > Département de géologie > Paléontologie animale et humaine >]
Cappetta, Henri []
Vincent, Peggy []
Garcia, Géraldine []
Goolaerts, Stijn []
Martin, Jérémy E. []
Roggero, Daniel []
Valentin, Xavier []
2014
Naturwissenschaften (Die)
Springer Verlag
101
1027–1040
Yes (verified by ORBi)
International
0028-1042
1432-1904
Berlin
Germany
[en] Ichthyosauria ; Shastasauridae ; Paléontologie ; Rhaetian ; Latest Triassic extinction ; turnover
[en] Mesozoic marine reptiles went through a severe turnover near the end of the Triassic. Notably, an important extinction event affected ichthyosaurs, sweeping a large part of the group. This crisis is, however, obscured by an extremely poor fossil record and is regarded as protracted over the entire Norian–earliest Jurassic interval, for the lack of a more precise scenario. The iconic whale-sized shastasaurid ichthyosaurs are regarded as early victims of this turnover, disappearing by the middle Norian. Here we evaluate the pattern of this turnover among ichthyosaurs by analysing the faunal record of two Rhaetian localities. One locality is Autun, eastern France; we rediscovered in this material the holotypes or partial ‘type’ series of Rachitrema pellati, Actiosaurus gaudryi, Ichthyosaurus rheticus, Ichthyosaurus carinatus and Plesiosaurus bibractensis; a revised taxonomic scheme is proposed. The second assemblage comes from a new locality: Cuers, southeastern France. Both these assemblages provide several lines of evidence for the presence of shastasaurid-like ichthyosaurs in the Rhaetian of Europe. These occurrences suggest that both the demise of shastasaurids and the sudden radiation of neoichthyosaurians occurred within a short time window; this turnover appears not only more abrupt but also more complex than previously postulated and adds a new facet of the end-Triassic mass extinction
Researchers ; Professionals ; Students ; General public
http://hdl.handle.net/2268/172355
10.1007/s00114-014-1242-7

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