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首页> 外文期刊>Geodiversitas >Lower Jurassic (Pliensbachian-Toarcian) belemnites from Fresney-le-Puceux (Calvados, France): taxonomy, chronostratigraphy and diversity
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Lower Jurassic (Pliensbachian-Toarcian) belemnites from Fresney-le-Puceux (Calvados, France): taxonomy, chronostratigraphy and diversity

机译：来自Fresney-le-Puceux（法国卡尔瓦多斯）的下侏罗世（普林斯巴赫-托尔斯人）贝勒芒：分类学，年代地层学和多样性

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The present paper deals with the systematic description of the belemnite assemblages from the Lower Jurassic, collected at the Roche Blain quarry, Fresney-le-Puceux. In spite of the reduced thickness of the succession at Fresney-le-Puceux, 13 successive ammonite chronozones could be documented in this rather unique outcrop situation in mainland Europe. Twelve genera and 26 species of belemnites belonging to the Passaloteuthididae, Hastitidae, Megateuthididae, Salpingoteuthididae, and family incertae sedis are described and illustrated herein. The stratigraphical range of the belemnites is correlated with the standard ammonite zonation, using the chronozone concept: the described specimens range from the lower Pliensbachian (Davoei Chronozone) to the uppermost Toarcian (Aalensis Chronozone) while ammonites indicate the Aalenian (Murchisonae Chronozone) to be present too, but these beds delivered no identifiable belemnites so far. The belemnite diversity from Normandy is compared to data from coeval outcrops in Western and Central Europe.
机译：本文讨论了从下侏罗纪的贝勒石集合体的系统描述，该集合体是在弗雷斯尼-勒-普塞（Fresney-le-Puceux）的罗氏布莱恩采石场收集的。尽管弗雷斯尼-勒-普塞（Fresney-le-Puceux）的演替厚度减小了，但在欧洲大陆这种相当独特的露头情况下，仍可以记录到13个连续的铵盐年代纪。本文描述并举例说明了十二属和二十二种贝类动物，它们分别属于Passaloteuthididae，Hastitidae，Megateuthididae，Salpingoteuthididae和不安全家族。贝留尼特的地层范围与标准铵盐地带相关联，采用年代学带的概念：所描述的标本范围从下部的Pliensbachian（Davoei Chronozone）到最高的Toarcian（Aalensis Chronozone），而炸药则表明Aalenian（Murchisonae Chronozone）是也存在，但是这些床到目前为止没有提供可识别的贝伦尼特犬。将诺曼底的贝伦石多样性与西欧和中欧的近代露头数据进行了比较。

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