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首页> 外文期刊>Journal of nannoplankton research: A publication of the International Nannoplankton Association >New data on the structure of early fasciculiths from a combined LM and SEM study
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New data on the structure of early fasciculiths from a combined LM and SEM study

机译：来自LM和SEM学习中早期筋膜岩结构的新数据

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摘要

With the appearance of several new genera of calcareous nannofossils in the early to late Paleocene,this is a time interval where we see new nannofossil morphological structures. Due to their rapid diversification, fasciculiths have considerable biostratigraphic relevance for this time interval. Recently, GSSP studies on the base of Selandian renewed interest in the fasciculiths with detailed studies on taxonomy, biostratigraphy, and evolution. The second radiation of Fasciculithus has been used to approximate the Danian-Selandian boundary in the low-middle latitudes (Bernaola et al., 2009). Several studies have been performed on the earlier forms with identification of new species and taxonomic reviews (Bernaola et al., 2009; Aubry et al., 2011,2012, Monechi et al., 2013a, b). The genus Fasciculithus was emended by Aubry et al. (2011), and three new genera, Gomphiolithus, Diantholitha, and Lithoptychius, were identified based on to their structural features (column, collaret, calyptra, and central body). However, doubts concerning identification of the new taxonomy have been expressed by Agnini et al. (2014), reporting a scarcity of data for a systematic emendation of this group.
机译：随着几个新世代的钙质Nannofosss在早期到后期古代的外观，这是我们看到新的Nannofossil形态学结构的时间间隔。由于它们的快速多样化，楣岩具有相当大的生物数据学相关性。最近，GSSP研究了Selandian的基础，对筋膜岩的重新兴趣，详细研究了分类法，生物数据库和演变。 Fasciculithus的第二次辐射已被用来近似于低中纬度地区的丹尼亚 - 塞兰尼亚边界（Bernaola等，2009）。已经对较早的形式进行了几项研究，具有鉴定新物种和分类评论（Bernaola等，2009; Aubry等，2011,2012，Monechi等，2013a，b）。由Aubry等人强化了Fasciculithus。 （2011）和三个新的Gomphiolithus，Diantholitha和Lithoptychius是基于其结构特征（柱，锁环，拨型和中央体）。然而，关于鉴定新分类物的怀疑是由Agnini等人表达的。 （2014），报告稀缺对该集团的系统修改的数据稀缺。

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