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Albian Eoradiolites (Bivalvia: Radiolitidae) from Jabal NaÏmia, Gafsa Region, Tunisia, with revisional studies on the Albian forms of the genus

Published online by Cambridge University Press:  14 July 2015

Jose Maria Pons
Affiliation:
1Departamento de Geologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
Enric Vicens
Affiliation:
1Departamento de Geologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
Fettouma Chikhi-Aouimeur
Affiliation:
2Université des Sciences et de la Technologie ‘H. Boumédienne’, Algiers, Algeria
Hassen Abdallah
Affiliation:
2Laboratoire de Géoénergie, CRTEn, Technopole Borj Cédria, Hammam-Lif, Tunisia

Abstract

The external morphology and its variability, myocardinal apparatus, and shell structure of both valves of the radiolitid rudist Eoradiolites plicatus (Conrad) are described, based on the examination of about one hundred well-preserved, fairly complete specimens that are free of sediment matrix, found in a single bed of an ammonite-bearing Albian succession ('Knemiceras beds', Zebbag Formation) in central Tunisia. This study provides the most nearly complete knowledge of any Eoradiolites species to date. With this background, all previous records of E. plicatus, as well as the taxonomic status of the other Albian species of the genus, are revised considering both original material, when available, and published papers. As a result, the systematics of Eoradiolites is simplified.

Type
Research Article
Copyright
Copyright © The Paleontological Society 

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