The long-running debate over the use of a formally defined Middle Cretaceous is discussed in terms of the distribution of both planktic and benthic foraminifera. The planktic assemblages of the Albian and Cenomanian stages are quite distinctive but, while the benthic foraminifera provide little evidence of significant change at the Aptian–Albian boundary, there is a significant turnover at the Cenomanian–Turonian Boundary Event (CTBE).

中文翻译：

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白垩纪中期辩论：来自有孔虫的证据

关于使用正式定义的中白垩纪的长期争论是根据浮游和底栖有孔虫的分布进行讨论的。Albian 和 Cenomanian 阶段的浮游组合非常独特，但是，虽然底栖有孔虫几乎没有提供 Aptian-Albian 边界显着变化的证据，但 Cenomanian-Turonian 边界事件（CTBE）有显着的转换。