The heterodont bivalve Maghrebella forgemoli (Coquand, 1862) from Cenomanian of Batna,northeastern Algeria: Palaeobiogeography,biostratigraphy and palaeoenvironment |
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| Institution: | 1. University of Oum el Bouaghi, Laboratory of Geological Research (LRG), B.P.12, 23000 Annaba, Algeria;2. University of Badji Mokhtar, Annaba, Laboratory of Geological Research (LRG), B.P. 12, 23000 Annaba, Algeria;1. Faculty of Natural Sciences, University of Silesia in Katowice, B?dzińska 60, 41-200 Sosnowiec, Poland;2. UCD Earth Institute and School of Biology and Environmental Science, Science Centre West, University College Dublin, Belfield, Dublin 4, Ireland;3. Institute of Paleobiology, Polish Academy of Sciences, Twarda 51/55, 00-818 Warszawa, Poland |
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| Abstract: | In the northern Aurès Range near Batna, Algeria, the Cenomanian Smail Marls Formation consists of fossiliferous deposits rich in diverse benthic macrofauna, mostly dominated by bivalves, among them the carditid Maghrebella forgemoli (Coquand, 1862). Almost exclusively Cenomanian, the abundance zone of Maghrebella forgemoli is in the higher levels of Lower Cenomanian, extending from the Sharpeiceras schlueteri zone to the Mantelliceras dixoni zone and corresponds to a limited circalittoral interval with relatively low energy, soft substrata, and relatively cold temperatures. The distribution of Maghrebella forgemoli in Mountains of Batna evidences bathymetric variation controlled by the tectonic activity affecting the ante-Triassic and the Upper Cretaceous substrata and generating a system of tilted blocks, at the beginning of the uppermost Albian-Cenomanian and Turonian, in the eastern Atlasic domain that extends to central Tunisia. |
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