Reference : The first definite record of a Valanginian ichthyosaur and its implications on the ev...
Scientific journals : Article
Life sciences : Zoology
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
The first definite record of a Valanginian ichthyosaur and its implications on the evolution of post-Liassic Ichthyosauria
Fischer, Valentin mailto [Université de Liège - ULiège > Département de géologie > Paléontologie animale et humaine > >]
Clément, Arnaud [> >]
Guiomar, Myette [Réserve naturelle géologique de Haute-Provence > > > >]
Godefroit, Pascal [Institut Royal des Sciences Naturelles de Belgique > Vertebrate Palaeontology > > >]
Cretaceous Research
Yes (verified by ORBi)
[en] Ichthyosauria ; Aegirosaurus ; Valanginian ; Southeastern France ; Vocontian Basin ; Feeding guilds ; Jurassic-Cretaceous extinction
[en] A complete ichthyosaur rostrum, with 124 associated teeth, was recently discovered in Laux-Montaux locality, department of Drôme, southeastern France. The associated belemnites and ammonites indicate a late Valanginian age (Neocomites peregrinus Zone, Olcostephanus nicklesi Subzone) for this fossil, which consequently represents the first diagnostic ichthyosaur ever reported from Valanginian strata. This specimen also represents the first occurrence of Aegirosaurus outside the Tithonian (Upper Jurassic) lithographic limestones of Bavaria (southern Germany). Tooth morphology and wear pattern suggest that Aegirosaurus belonged to the “Pierce II/ Generalist” feeding guild, which was hitherto not represented in post-Liassic ichthyosaurs. Most Late Jurassic ichthyosaurs actually crossed the Jurassic-Cretaceous boundary.
Service de paléontologie animale et humaine
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