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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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New ophthalmosaurids from Europe and Russia broaden the biodiversity of early Cretaceous ichthyosaurs Fischer, V. (2011). New ophthalmosaurids from Europe and Russia broaden the biodiversity of early Cretaceous ichthyosaurs. J. Vertebr. Paleontol. 31: 110-110 In: Journal of Vertebrate Paleontology. Society of Vertebrate Paleontology: Norman, Okla.. ISSN 0272-4634; e-ISSN 1937-2809, meer

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Trefwoorden

Geological time > Phanerozoic > Geological time > Mesozoic > Cretaceous > Cretaceous, Lower > Barremian Geological time > Phanerozoic > Geological time > Mesozoic > Cretaceous > Cretaceous, Lower > Hauterivian Geological time > Phanerozoic > Geological time > Mesozoic > Cretaceous > Cretaceous, Lower > Valanginian Ichthyosauria Europe, Europe [Marine Regions]; Russia [Marine Regions] Marien/Kust

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Auteur		Top
Fischer, V., meer

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Abstract

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.

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