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Conodontes de la formation de Fromelennes du Givetien de l’Ardenne Franco-Belge
Bultynck, P. (1974). Conodontes de la formation de Fromelennes du Givetien de l’Ardenne Franco-Belge. Bull. Kon. Belg. Inst. Natuurwet. Aardwet. = Bull. - Inst. r. sci. nat. Belg., Sci. Terre 50(10): 30 pp 3 figs 5 pls
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
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  • Bultynck, P., more

Abstract
    A preliminary detailed list of the conodonts from the Fromelennes Formation is established. This formation is subdivided into three members. At three levels faunal changes are clear enough to characterize important biostratigraphic boundaries. Polygnathus rhenanus, P. dubius and leriodus eslaensis latecarinatus n. subsp. characterize the first level, Spatbognathodus insitus and Schmidtognatbus hermanni the second, and Ancyrodella rotundiloba the third. Only the last two levels are taken into account in defining the boundary between the Givetian and the Frasnian and between the Middle and Upper Devonian. The new subspecies, Icriodus eslaensis latecarinatus, is fully described. Diagrams of other important species and subspecies relevant to the problem are given and they are briefly discussed,

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