Abstract The stratigraphic reappraisal of the Urgonian-type carbonate platform series of southeastern France, based on new ammonite discoveries, supports a precise dating of the Brouzet-les-Ales, Orgon and Rustrel upper Barremian–lower Aptian rudist faunas. The Brouzet-les-Ales fauna consists of an assemblage dominated by Homopleura and Agriopleura species spanning the Toxancyloceras vandenheckii Zone and the two lower subzones of the Gerhardtia sartousiana Zone (Gerhardtia sartousiana and Gerhardtia provincialis subzones). The Orgon fauna is characterised by an impoverished requieniid–monopleurid assemblage (missing Agriopleura) restricted to the upper part of the Gerhardtia sartousiana Zone (= Hemihoplites feraudianus Subzone). The Rustrel fauna records the outbreak of caprinid rudists, ascribed to the Martelites sarasini Subzone of the Martelites sarasini Zone, though some its key taxa locally extend into the lower Aptian. The definition of these rudist faunas is based on the combined First Occurrence (FO) or Last Occurrence (LO) of cardinal species and the co-occurrence of subordinate taxa. Two main faunal changes are recognized, viz. the regional disappearance of Agriopleura (collapse of the Bouzet-les-Ales fauna) and the beginning of the family Caprinidae (Rustrel fauna). Both faunal changes have a widespread records along the western European Tethys margins and coincide with large-scale environmental perturbations.

中文翻译：

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法国东南部 Urgonian 型矿床中三个连续上巴雷米亚 - 下阿普蒂安原始动物群的证据及其地层价值

摘要 基于新发现的菊石，对法国东南部 Urgonian 型碳酸盐台地系列的地层重新评价，支持对 Brouzet-les-Ales、Orgon 和 Rustrel 上巴雷米安-下阿普蒂安类动物群进行精确测年。Brouzet-les-Ales 动物群由以 Homopleura 和 Agriopleura 物种为主的组合组成，跨越 Toxancyloceras vandenheckii 区和 Gerhardtia sartousiana 区的两个较低亚区（Gerhardtia sartousiana 和 Gerhardtia Provinceis 亚区）。Orgon 动物群的特点是贫困的 requieniid-monopleurid 组合（缺少 Agriopleura）仅限于 Gerhardtia sartousiana 区（= Hemihoplites feraudianus 亚区）的上部。Rustrel 动物群记录了山羊属 rudists 的爆发，归因于 Martelites sarasini 区的 Martelites sarasini 亚区，尽管其一些关键分类群在当地延伸到较低的 Aptian。这些原始动物群的定义是基于主要物种的首次出现 (FO) 或最后出现 (LO) 以及下级分类群的共同出现。认识到两个主要的动物群变化，即。Agriopleura 的区域性消失（Bouzet-les-Ales 动物群的崩溃）和山羊科（Rustrel 动物群）的开始。这两种动物群变化在西欧特提斯边缘都有广泛的记录，并且与大规模的环境扰动相吻合。这些原始动物群的定义是基于主要物种的首次出现 (FO) 或最后出现 (LO) 以及下级分类群的共同出现。认识到两个主要的动物群变化，即。Agriopleura 的区域性消失（Bouzet-les-Ales 动物群的崩溃）和山羊科（Rustrel 动物群）的开始。这两种动物群变化在西欧特提斯边缘都有广泛的记录，并且与大规模的环境扰动相吻合。这些原始动物群的定义是基于主要物种的首次出现 (FO) 或最后出现 (LO) 以及下级分类群的共同出现。认识到两个主要的动物群变化，即。Agriopleura 的区域性消失（Bouzet-les-Ales 动物群的崩溃）和山羊科（Rustrel 动物群）的开始。这两种动物群变化在西欧特提斯边缘都有广泛的记录，并且与大规模的环境扰动相吻合。