Three New Species of Ulnaria (Kützing) Compère (Bacillariophyta) from China, with Reference to the Fine Structure of Their Valvocopula

IF 1.4 4区生物学 Q3 MARINE & FRESHWATER BIOLOGY

Cryptogamie Algologie Pub Date : 2019-12-11 DOI:10.5252/cryptogamie-algologie2019v40a11

Bing Liu, David M. Williams, S. Blanco, Zhu-xiang Liu, Dan Liu

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引用次数: 3

Abstract

ABSTRACT Three new species of Ulnaria (Kützing) Compère are described based on light and scanning electric microscopy observations. Ulnaria oxybiseriata D.M. Williams & Bing Liu, sp. nov., has linear-lanceolate to lanceolate valves with apiculate and produced ends, biseriate striae, and a central area mostly forming an incomplete fascia surrounded by shortened striae on one side. Ulnaria jinbianensis S. Blanco & Bing Liu, sp. nov., bears linear-lanceolate valves with rostrate to subrostrate ends in larger valves and cuneate ends in smaller valves, uniseriate stria, and a central area forming a rectangular to trapezoid fascia. Ulnaria dongtingensis Bing Liu, sp. nov., possesses a narrow-lanceolate valve outline with produced rostrate to capitate ends, uniseriate stria, and a central area forming almost square fascia. The valvocopula of all three new species bears the same ultrastructure: 1) a complete valvocopula is a closed ring with the same shape as the valve outline, closely attached to the mantle interior surrounding the valve margin; 2) each valvocopula present a row of poroids which bisects the pars interior and exterior; 3) valvocopula with sawtooth-shaped projections attached to the valve over virgae internally; and 4) the valvocopula closed and hyaline at both apices. All three species were found in alkaline freshwater (around pH 8) with moderate conductivity (c. 102-221 µS/cm).

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中国Ulnaria (k tzing) compcompre(硅藻门)三新种及其瓣门精细结构的比较

摘要根据光镜和扫描电镜观察，描述了乌尔纳利亚(k tzing) compcompre的3个新种。叶瓣为线状披针形至披针形，末端具细尖，有双棱纹，中部大部分形成不完整的膜，被一侧的短纹包围。金边尺蠖(Ulnaria jinbianensis S. Blanco)和刘兵(Bing Liu, p. nov.)具有线状披针形的球阀，较大的球阀具有顶状到底状的端部，较小的球阀具有楔形的端部，单叶条纹，中心区域形成矩形到梯形的瓣膜。冬青叶，刘兵，sp. nov.，具有窄披针形的阀形轮廓，端部为平头状，条纹单列，中心区域形成近方形的瓣膜。三个新种的瓣膜瓣具有相同的超微结构:1)完整的瓣膜瓣瓣是一个与瓣膜轮廓形状相同的封闭环，紧密地附着在围绕瓣膜边缘的地幔内部;(2)每个瓣孔上有一排孔，将瓣内和瓣外分两半;3)阀孔，具锯齿状突起，在阀腔内部与阀相连;4)瓣口两端闭合透明。这三种物种均在pH 8左右的碱性淡水中发现，电导率适中(c. 102-221µS/cm)。

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

Cryptogamie Algologie 生物-海洋与淡水生物学

CiteScore

2.60

自引率

7.70%

发文量

审稿时长

>12 weeks

期刊介绍： Cryptogamie is a fast-track and peer-reviewed journal of international scope publishing in English only. It accepts original papers and review articles on the taxonomy, biology and ecology of all cryptogams. An issue of Cryptogamie may be devoted to a single topic, under the responsibility of guest editor(s). All articles published in Cryptogamie are compliant with the different nomenclatural codes. A copyright assignment will be signed by the authors before publication. Cryptogamie, Algologie accepts articles on systematics as well as ecology and evolution of any kind of algae (including Cyanobacteria).