Palaeoenvironmental vs. evolutionary control on size variation of coccoliths across the Lower-Middle Jurassic
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- 作者：Jorge Ferreiraa ; jorge.ferreira@univ-lyon1.fr" class="auth_mail" title="E-mail the corresponding author ; Emanuela Mattiolia ; Bas van de Schootbruggeb
- 关键词：Calcareous nannofossils ; Biometry ; Toarcian-Aalenian ; Western Tethys ; Lotharingius
- 刊名：Palaeogeography, Palaeoclimatology, Palaeoecology
- 出版年：2017
- 出版时间：1 January 2017
- 年：2017
- 卷：465
- 期：part_PA
- 页码：177-192
- 全文大小：3089 K
文摘
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Two different populations of Lotharingius at 4 μm boundary are recognized.
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These two groups define a consistent stratigraphic boundary in the middle Toarcian.
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Long-term evolution of Lotharingius was likely genetically driven leading to larger sizes.
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Under environmentally unstable conditions small coccoliths were produced.
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Ecological stability likely triggered the occurrence of larger coccoliths.