Reference : A new Barremian (Early Cretaceous) ichthyosaur from western Russia
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
A new Barremian (Early Cretaceous) ichthyosaur from western Russia
Fischer, Valentin mailto [Université de Liège - ULg > Département de géologie > Paléontologie animale et humaine >]
Masure, Edwige [Université Pierre et Marie Currie - Paris 6 - UPMC > UMR CNRS 7207 > > >]
Arkhangelsky, Maxim [Saratov State university > > > >]
Godefroit, Pascal [Institut Royal des Sciences Naturelles de Belgique > Paléontologie > > >]
Journal of Vertebrate Paleontology
Yes (verified by ORBi)
[en] Ichthyosauria ; Ophthalmosauridae ; Barremian ; Early Cretaceous ; Russia ; Ecological diversity
[en] A new ophthalmosaurid ichthyosaur, Sveltonectes insolitus gen. et sp. nov., is
described from a sub-complete and three-dimensionally preserved specimen from the late
Barremian of western Russia. This new taxon is supported by 11 cranial, dental, and
postcranial autapomorphies, and is also characterized by features previously considered as
autapomorphic for some other Ophthalmosauridae, such as a processus narialis on the
prefrontal and relatively long hindfins with pre- and postaxial accessory digits. We conducted
a new phylogenetic analysis of Thunnosauria, which supports a ‘Stenopterygius-origin’ for
Ophthalmosauridae. Sveltonectes is regarded as the sister taxon of Aegirosaurus, which shares
a similar skull roof construction. Contrary to most other Cretaceous ichthyosaurs,
Sveltonectes is characterized by delicate and sharply pointed teeth, confirming that the
Ophthalmosauridae were ecologically highly diversified during the Early Cretaceous
Centre de Geosciences
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
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