Article (Scientific journals)
New data on the ichthyosaur Platypterygius hercynicus and its implications for the validity of the genus
Fischer, Valentin
2012In Acta Palaeontologica Polonica, 57 (1), p. 123–134
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Keywords :
Ichthyosauria; Ophthalmosauridae; Platypterygius hercynicus; Saint-Jouin; France; Cretaceous
Abstract :
[en] The description of a nearly complete skull from the late Albian of northwestern France reveals previously unknown anatomical features of Platypterygius hercynicus (Kuhn 1946), and of European Cretaceous ichthyosaurs in general. These include a wide frontal forming the anteromedial border of the supratemporal fenestra, a parietal excluded from the parietal foramen, and the likely presence of a squamosal, inferred from a very large and deep facet on the quadratojugal. The absence of a squamosal has been considered as an autapomorphy of the genus Platypterygius for more than ten years and has been applied to all known species by default, but the described specimen casts doubt on this putative autapomorphy. Actually, it is shown that all characters that have been proposed previously as autapomorphic for the genus Platypterygius are either not found in all the species currently referred to this genus, or are also present in other Ophthalmosauridae. Consequently, the genus Platypterygius must be completely revised.
Research center :
Paléontologie
Disciplines :
Earth sciences & physical geography
Author, co-author :
Fischer, Valentin  ;  Université de Liège - ULiège > Département de géologie > Paléontologie animale et humaine
Language :
English
Title :
New data on the ichthyosaur Platypterygius hercynicus and its implications for the validity of the genus
Publication date :
2012
Journal title :
Acta Palaeontologica Polonica
ISSN :
0567-7920
eISSN :
1732-2421
Publisher :
Polska Akademia Nauk, Poland
Volume :
57
Issue :
1
Pages :
123–134
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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