Reference : New ophthalmosaurids from Europe and Russia broaden the biodiversity of Early Cretace...
Scientific congresses and symposiums : Poster
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/101543
New ophthalmosaurids from Europe and Russia broaden the biodiversity of Early Cretaceous ichthyosaurs
English
Fischer, Valentin mailto [Université de Liège - ULg > Département de géologie > Paléontologie animale et humaine >]
Nov-2011
Yes
No
International
71st Annual Meeting of the Society of Vertebrate Paleontology
02-11-2011 to 05-11-2011
Las Vegas (NV)
USA
[en] Ichthyosauria ; Ophthalmosauridae ; Jurassic–Cretaceous boundary ; Extinction ; Diversity ; Extinction rate
[en] Ophthalmosauridae is a successful clade of ichthyosaurs that rapidly diversified during the
Middle Jurassic. By Late Jurassic, Ophthalmosauridae were diverse, widespread, and formed
an important component of the marine trophic webs. By contrast, the record of Berriasian-
Aptian ichthyosaurs is extremely poor, and all ichthyosaurs from that interval have been
referred to a single genus, Platypterygius, until recently. This apparent diversity drop led
numerous authors to recognize a severe ichthyosaur extinction at the end of the Jurassic
that left ichthyosaurs as a small group on the decline. New specimens from poorly sampled
time periods (late Valanginian, late Hauterivian and late Barremian) in Europe and Russia
contradict this latest Jurassic extinction hypothesis and show that new and highly derived
as well as typically ‘Late Jurassic’ ichthyosaurs roamed the Eurasian archipelago during the
Early Cretaceous. Moreover, these new forms occupied ecological niches markedly different
from that of Platypterygius, significantly broadening the disparity and ecological diversity of
Cretaceous ichthyosaurs
Centre de Geoscience
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers ; Students ; General public
http://hdl.handle.net/2268/101543

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