New palaeontological data from the organic-rich layers of the Bathonian of the Grands Causses (France)

作者：Knoll Fabien^*; Cuny Gilles; Mojon Pierre Olivier; Lopez Antonanzas Raquel

来源：Proceedings of the Geologists Association, 2014, 125(3): 312-316.

DOI：10.1016/j.pgeola.2014.04.003

• Porochara
• Hybodus
• Lepidotes
• Pycnodontiformes
• Caturus
• Bathonian

The palaeontological content (charophytes and vertebrates) of organic-rich layers from the Middle Jurassic (Bathonian) of the Grands Causses at Mostuejouls (Aveyron, France) has been examined. It is rich in gyrogonites of Porochara douzensis. The vertebrates of the lower layer include a single hybodontiform tooth, "semionotiform" teeth and scales, and one pycnodontiform tooth whereas the upper layer has yielded one hybodontiform tooth, a variety of actinopterygian remains (mostly Caturus sp. and indeterminate pycnodontiforms) and a few possible reptile remains. The variation in fauna between the two layers is ascribed to a different degree of marine influence.

• 出版日期2014-7