Psammothidium elnatanianum sp. nov. (Achnanthidiaceae, Bacillariophyta) a new diatom species found in Holocene sediments (Meghalayan Age) of the Xingu River, Eastern Amazon

IF 1.5 4区生物学 Q3 PLANT SCIENCES

Botany Letters Pub Date : 2022-07-03 DOI:10.1080/23818107.2022.2095671

K. S. Morais, L. F. Costa, C. Bicudo, C. E. Wetzel

引用次数: 0

Abstract

ABSTRACT An unknown species of Psammothidium (Achnanthidiaceae) was found in core sediment (~4000 cal yr BP) collected from Xingu ria, located in eastern Amazon Basin (Brazilian Amazon). The detailed morphology of the new species was examined and described using light (LM) and scanning electron (SEM) microscopy. The new species described here is mainly characterized by small valve dimensions, an irregular and expanded central area in rapheless valve (RLV) clearly visible in LM. Under SEM observations, the new species show slightly radiate striae with rectangular to rounded areolae present both on the surface and the valve mantle. Morphology and ecology of the new species is compared to those already described for the genus. Moreover, information about core chronology and the co-occurrence of other diatom species in the sample are also provided.

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Psammthidium elnatanianum sp.nov.（Achnanthidiaceae，Bacillarophyta）是在亚马逊东部新古河全新世沉积物（Meghalayan时代）中发现的一种新的硅藻

摘要：在巴西亚马逊盆地东部的新谷里采集的岩心沉积物（约4000卡年BP）中发现了一种未知的沙霉属植物。利用光学（LM）和扫描电子（SEM）显微镜检查和描述了新物种的详细形态。本文描述的新物种主要特征是瓣膜尺寸小，在LM中清晰可见无缝瓣膜（RLV）的不规则和扩张的中心区域。在SEM观察下，新物种的表面和阀套上都有轻微的放射状条纹，具有矩形到圆形的乳晕。将新物种的形态和生态学与已经描述的属进行了比较。此外，还提供了有关岩芯年代和样品中其他硅藻物种共存的信息。

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

Botany Letters Agricultural and Biological Sciences-Plant Science

CiteScore

3.10

自引率

6.70%

发文量

期刊介绍： Botany Letters is an international scientific journal, published by the French Botanical Society (Société botanique de France) in partnership with Taylor & Francis. Botany Letters replaces Acta Botanica Gallica, which was created in 1993, building on over a century of renowned publications by the Société botanique de France.