Upsilococconeis dapalistriata gen. nov. & comb. nov. (Bacillariophyta) – a pantropical marine member of Cocconeidaceae

IF 0.9 4区环境科学与生态学 Q4 OCEANOGRAPHY Oceanological and Hydrobiological Studies Pub Date : 2022-03-01 DOI:10.26881/oahs.2022.1.03

C. Riaux-Gobin, A. Witkowski, Y. Risjani, Y. Yunianta, V. Berteaux-Lecellier, A. Kryk, Łukasz Peszek, Genowefa Daniszewska-Kowalczyk

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引用次数: 2

Abstract

Abstract Cocconeis dapalistriata, first described as a member of the genus Cocconeis, is re-examined due to its unique ultrastructure. Both valvocopulae of this taxon show significant differences compared to those found in the genus Cocconeis. They are expanded and show some similarities with those found in Amphicocconeis. On the other hand, terminal parts of the raphe valve (RV) in C. dapalistriata are simple and the raphe valve (RV) striae are composed of small round areolae with a hymenate occlusion with radial slits, similar to those observed in Cocconeis. Campyloneis and Xenococconeis also have expanded valvocopulae but with numerous morphological differences compared to those found in C. dapalistriata. Furthermore, the areolae of the sternum valve (SV) in C. dapalistriata are occluded by a concave velum with no apparent internal slits, and externally ornamented with irregular silica crystals. Upsilococconeis Riaux-Gobin, Witkowski & Risjani gen. nov. is proposed to accommodate the latter taxon. First described from the Western Indian Ocean (Mascarenes), it was subsequently listed from the Western Pacific Ocean (Guam), the South Pacific Ocean (French Polynesia and New Caledonia) and from the Eastern Indian Ocean (Indonesia), and thus may qualify as pantropical.

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upsilococconis dapalistriata gen. 11 . & comb。11 .(硅藻门)-球藻科的泛热带海洋成员

摘要斑点球蚧是球蚧属的一种，由于其独特的超微结构而被重新研究。该分类单元的两个瓣叶总科与球蝶属相比显示出显著差异。它们被扩展，并显示出与在安菲球虫中发现的那些相似之处。另一方面，灰蝶中缝瓣（RV）的末端部分很简单，中缝瓣纹由小圆乳晕组成，处女膜闭塞，有径向狭缝，类似于在Cocconeis中观察到的。Campyloneis和Xenococoneis也有扩张的瓣叶，但与在C.dapalistriana中发现的瓣叶相比有许多形态学差异。此外，达氏锥虫胸骨瓣（SV）的乳晕被一个没有明显内部狭缝的凹膜堵塞，外部装饰有不规则的二氧化硅晶体。Upsilococconeis Riaux-Gobin，Witkowski&Risjani gen.nov.被提议容纳后一个分类单元。它最初从西印度洋（马斯卡伦内斯）被描述，后来从西太平洋（关岛）、南太平洋（法属波利尼西亚和新喀里多尼亚）和东印度洋（印度尼西亚）被列为泛热带。

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来源期刊

Oceanological and Hydrobiological Studies 地学-海洋学

CiteScore

1.70

自引率

11.10%

发文量

审稿时长

>12 weeks

期刊介绍： Oceanological and Hydrobiological Studies is an international journal published by the Institute of Oceanography, University of Gdańsk in Poland. The journal has 4 issues per year and contains papers on all aspects of the marine environment and hydrobiology. All manuscripts are reviewed by editors and independent experts. Based on the referees'' recommendations, the Editor will make a decision on whether to accept a contribution. All articles are published in English. The journal is open to all matters concerning the water environment, thus providing the readers with a wide spectrum of topics in every issue.