Davidharwoodia megaspina gen. et sp. nov. (Corethrales), a new fossil marine diatom genus from Mors, Jutland (early Eocene)

IF 1.9 3区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Diatom Research Pub Date : 2023-01-02 DOI:10.1080/0269249X.2022.2159883

K. Abe, R. Jordan

引用次数: 0

Abstract

A taxonomic survey of the early Eocene diatomites of Mors has revealed a new member of the Corethrales, Davidharwoodia megaspina gen. et sp. nov., which is the first fossil Corethron-like diatom to possess backward-pointing spines. The new species is presumably heterovalvate, with a rounded pyramidal Type 1 valve bearing a single huge leaf-shaped spine (and corresponding large socket) in addition to the narrower spines, and a more elongate helmet-shaped Type 2 valve possessing spines of a different design and twice as many sockets of equal size. The genus can be distinguished from Micrampulla by lacking the large inflated structures emanating from the dome, from Praecorethron by a narrower marginal area and vertically placed sockets, and from Corethron by lacking hooked spines.

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Davidharwoodia megaspina gen. et sp. 11 . (Corethrales)，日特兰摩尔斯(早始新世)海洋硅藻属新化石

对摩尔斯早始新世硅藻的分类调查发现了Corethrales的新成员Davidharwoodia megaspina gen. et sp. nov.，这是第一个具有后指向棘的corethron类硅藻化石。这个新物种可能是异瓣形的，除了较窄的刺外，还有一个圆形的金字塔形的1型阀，它有一个巨大的叶形刺(和相应的大凹槽)，一个更长的盔形2型阀，它有一个不同设计的刺和两倍大小的凹槽。该属与Micrampulla的区别在于缺乏从穹顶中产生的大型膨胀结构，与preecorethron的区别在于有较窄的边缘区域和垂直放置的窝，与Corethron的区别在于缺乏钩状刺。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Diatom Research 生物-海洋与淡水生物学

CiteScore

2.70

自引率

16.70%

发文量

审稿时长

>12 weeks

期刊介绍： Diatom Research is the journal of the International Society for Diatom Research. The journal is published quarterly, in March, June, September and December, and welcomes manuscripts on any aspect of diatom biology. In addition to full-length papers, short notes and reviews of recent literature are published which need not contain all the sections required for full-length papers; we see these as being necessary to record information which is of interest but which cannot be followed up in detail. Discursive “Opinion” papers are encouraged which would not necessarily follow the normal lay-out. If extremely long papers are to be offered, the author(s) should contact the editors first to discuss any problems. Book reviews, obituaries and meeting reports can be published. All papers will be subject to critical review by the editors and referees, as appropriate to their content. Papers will be accepted in English only.