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Possible presence of Cretirhynchia undulata (PUSCH, 1837) in de Vijlen Chalk (Upper Maastrichtian) from Hallembaye (Belgium) and neighbouring area
Simon, E. (1993). Possible presence of Cretirhynchia undulata (PUSCH, 1837) in de Vijlen Chalk (Upper Maastrichtian) from Hallembaye (Belgium) and neighbouring area. Bull. Kon. Belg. Inst. Natuurwet. Aardwet. = Bull. - Inst. r. sci. nat. Belg., Sci. Terre 63: 73-97
In: Bulletin van het Koninklijk Belgisch Instituut voor Natuurwetenschappen. Aardwetenschappen = Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Sciences de la Terre. KBIN: Brussel. ISSN 0374-6291, more
Peer reviewed article  

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Keywords
    Cretaceous, Upper; Maastrichtian; Brachiopoda [WoRMS]; Rhynchonellida [WoRMS]; Belgium, Liège (Province) [Marine Regions]; Marine
Author keywords
    Brachiopods, Rhynchonellidae, Cretaceous, Maastrichtian, Hallembaye, Belgium, Brachiopodes, Crétacé, Maastrichtien, Belgique.

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Abstract
    Two distinct species of Cretirhynchia (Brachiopoda, Rhynchonellacea, Rhynchonellidae, Cyclothyridinae) were collected in the Vijlen Chalk (Upper Maastrichtian) from Hallembaye (Belgium). The first one is consistent with the diagnose of Cretirhynchia limbata (VON SCHLOTTHEIM, 1813). The second one cannot be connected with species already described for the Belgian fauna. A detailed comparison (for external and internal characters) between the Belgian and the Polish material collected in the Upper Maastrichtian from the middle Vistula river valley has shown numerous similarities with the young adults of Cretirhynchia undulata (PUSCH, 1837). This specific determination is proposed for the Belgian material from Hallembaye but it is subject to the study of the material coming from the intervening geographical area (Germany) which is still urgently awaited. Therefore the creation of a new species or new subspecies for the Belgian specimens is not necessary at present.

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