0000000000405148

AUTHOR

Stéphane Bersac

showing 2 related works from this author

Problems in the identity of "Crioceras" barremense Kilian, 1895 (Ancyloceratida, Late Barremian), and their proposed resolution

2010

17 pages; The study of "Crioceras" barremense KILIAN was undertaken as a part of the revision of the Hemihoplitidae. This species was considered "classic" and has been used as the index of an Upper Barremian subzone; this usage raises a number of problems. The type specimen from Tyrol was a fragment described and illustrated by UHLIG as Crioceras sp. ind. aff. roemeri. This specimen could not be retrieved, and a topotype could not be collected. Our study revealed that there is both a biostratigraphic hiatus and important differences between conceptions of this species: (1) that ascribed UHLIG's type specimen (Upper Barremian, Tyrol), (2) KILIAN's concept of the specimen he found and named "…

010506 paleontologyStratigraphyHiatusAmmonitinae[ SDU.STU.ST ] Sciences of the Universe [physics]/Earth Sciences/Stratigraphy010502 geochemistry & geophysics01 natural sciencesLower limitPaleontologylcsh:StratigraphyGenusmedicinelcsh:QE701-760Gassendiceras[ SDU.STU.PG ] Sciences of the Universe [physics]/Earth Sciences/Paleontology0105 earth and related environmental sciencesConfusionTaxonomylcsh:QE640-699Upper Barremianbiologylcsh:QE1-996.5PaleontologybiozonationGeologyAlpinum Subzonebiology.organism_classificationlcsh:GeologyBiohorizonlcsh:Paleontology[SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/StratigraphyAlpinum Subzone / BiohorizonGassendiceratinae[SDU.STU.ST] Sciences of the Universe [physics]/Earth Sciences/StratigraphyType specimen[SDU.STU.PG] Sciences of the Universe [physics]/Earth Sciences/PaleontologyVandenheckei Biozonemedicine.symptomsoutheastern France[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/PaleontologyCarnets de Géologie
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Nouveaux biohorizons et propositions pour le découpage biozonal ammonitique du Barrémien supérieur du Sud-Est de la France

2008

International audience; Un nouveau découpage biozonal ammonitique du Barrémien supérieur du Sud-Est de la France est proposé. Il tient compte des renouvellements fauniques, des données séquentielles ainsi que des données historiques. Il est enrichi de quatre biohorizons nouveaux. Le Barrémien supérieur comporte à présent les trois biozones (anciennement six) à Vandenheckei, Sartousiana et Giraudi. La première contient les trois sous-zones à Uhligi, dont le statut est discuté, Sayni et Barremense, ainsi que les deux nouveaux biohorizons à Marchandi et Breistrofferi (sommet de la Sous-Zone à Barremense). La Biozone à Sartousiana admet les sous-zones à Limentinus, Provincialis et Feraudianus. …

2. Zero hunger010506 paleontologyammonitesStratigraphyCrétacé inférieur téthysienPaleontologyGeologybiostratigraphieBiostratigraphy010502 geochemistry & geophysics[ SDU.STU.ST ] Sciences of the Universe [physics]/Earth Sciences/Stratigraphy01 natural sciencesGeographybiozone d'intervallerenouvellements fauniques[SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy[SDU.STU.ST] Sciences of the Universe [physics]/Earth Sciences/Stratigraphy[SDU.STU.PG] Sciences of the Universe [physics]/Earth Sciences/Paleontology[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/PaleontologyHumanities0105 earth and related environmental sciences[ SDU.STU.PG ] Sciences of the Universe [physics]/Earth Sciences/Paleontology
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