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首页> 外文期刊>Palaeontographica, Abteilung A. Palaozoologie-Stratigraphie >Cenomanian-Turonian bivalves from eastern Sinai, Egypt
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Cenomanian-Turonian bivalves from eastern Sinai, Egypt

机译：来自埃及西奈东部的西诺曼尼亚-土伦双壳类动物

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摘要

68 bivalve species belonging to 13 orders, 29 families, and 51 genera, are systematically described from three Cenomanian-Turonian sections (Gebel AreifEl-Naqa, East Themed, and Wadi Quseib) on the eastern side of the Sinai Peninsula. The stratigraphic range and palaeogeographic distribution is given for each species. Nine species are reported from Egypt for the first time. Due to their taxonomic relevance, the microstructure of the rudist taxa has been illustrated. The bivalve fauna strongly resembles that of other Tethyan regions in southern Europe, North Africa, Middle East, and eastern South America. Therefore, most of the identified taxa have a strong Tethyan affinity. The distribution patterns of bivalves have probably been influenced by east-west directed currents during the Ceno-manian. However, due to the presence of geographic barriers, extensive shallow marine shelf areas, and narrowing of the Tethys during that time, the current split up, one branch extending in a clockwise direction to southeastern Europe. The opening of the Trans-Saha-ran Seaway of southern Tethyan bivalves immigrated to western Africa and eastern South America.
机译：从西奈半岛东部的三个西诺曼尼亚-土伦期（Gebel AreifEl-Naqa，East Themed和Wadi Quseib）系统地描述了68种双壳类，分别属于13个科，29个科和51个属。给出了每个物种的地层范围和古地理分布。埃及首次报告了9种。由于它们在分类学上的相关性，已经说明了鲁迪斯分类群的微观结构。双壳类动物区系与南部欧洲，北非，中东和南美东部的其他特提斯地区非常相似。因此，大多数已识别的分类单元具有很强的特提斯亲和力。双壳类动物的分布方式可能已受到西诺马尼时期东西向流的影响。但是，由于当时存在地理障碍，广阔的浅海陆架区域以及特提斯山脉变窄，洋流分裂，一个分支沿顺时针方向延伸到东南欧。特提斯南部双壳类动物的跨萨哈兰海上航道的开放移民到西非和南美东部。

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