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The first definite record of a Valanginian ichthyosaur and its implications on the evolution of post-Liassic Ichthyosauria
Fischer, V.; Clément, A.; Guiomar, M.; Godefroit, P. (2011). The first definite record of a Valanginian ichthyosaur and its implications on the evolution of post-Liassic Ichthyosauria. Cretac. Res. 32(2): 155-163. hdl.handle.net/10.1016/j.cretres.2010.11.005
In: Cretaceous Research. Elsevier: London; New York. ISSN 0195-6671, more
Peer reviewed article  

Available in Authors 
    VLIZ: Open Repository 279802 [ OMA ]

Keywords
    Aegirosaurus; Ichthyosauria; Marine
Author keywords
    Ichthyosauria; Aegirosaurus; Valanginian; Southeastern France; Vocontian Basin; Feeding guilds; Jurassic-Cretaceous extinction

Authors  Top 
  • Fischer, V., more
  • Clément, A.
  • Guiomar, M.
  • Godefroit, P., more

Abstract
    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.

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