Cymbella alexandrovichii sp. nov. (Cymbellaceae, Bacillariophyceae), a new cymbelloid diatom species with predominantly biseriate striae from South-East Asia

IF 1 4区生物学 Q3 PLANT SCIENCES

Phytotaxa Pub Date : 2023-12-14 DOI:10.11646/phytotaxa.630.2.2

A. Glushchenko, Andrei Mironov, Irina Kuznetsova, M. Kulikovskiy

引用次数: 0

Abstract

A new species from the genus Cymbella is described based on the morphological study using light and scanning electron microscopy. In the new species, striae are predominantly biseriate except for the central part of the valve, where they become uniseriate. Cymbella alexandrovichii sp. nov. is compared to 8 similar species of Cymbella that possess biseriate striae throughout the valve or only near the apices. Another species with biseriate striae—Gomphocymbellopsis guijiangensis—was included in the comparison based on the similar morphology. In addition, 3 species of Cymbella are compared to Cymbella alexandrovichii sp. nov. herein, despite lacking biseriate striation. The new species can be distinguished from similar taxa by a combination of features: asymmetric lanceolate outline with convex dorsal margin, not protracted cuneate to bluntly rounded valve ends, predominantly biseriate striae and 2–3 ventral stigmata.

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Cymbella alexandrovichii sp.

根据光镜和扫描电子显微镜的形态学研究，描述了蚬属的一个新物种。在该新种中，条纹主要是双列的，只有气门中央部分的条纹变为单列。Cymbella alexandrovichii sp. nov.与 8 个类似的 Cymbella 物种进行了比较，这些物种在整个气门或仅在靠近顶端的地方具有双列条纹。另一个具有双列条纹的种--Gomphocymbellopsis guijiangensis--也因形态相似而被纳入比较范围。此外，本文还将 3 种 Cymbella 与 Cymbella alexandrovichii sp.该新种可通过以下特征与类似类群区分开来：不对称的披针形轮廓，背缘凸起，气门末端楔形到钝圆不明显，主要为双列条纹，2-3 个腹面柱头。

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

Phytotaxa PLANT SCIENCES-

CiteScore

1.90

自引率

27.30%

发文量

956

审稿时长

1 months

期刊介绍： Phytotaxa is a peer-reviewed, international journal for rapid publication of high quality papers on any aspect of systematic and taxonomic botany, with a preference for large taxonomic works such as monographs, floras, revisions and evolutionary studies and descriptions of new taxa. Phytotaxa covers all groups covered by the International Code of Nomenclature foralgae, fungi, and plants ICNafp (fungi, lichens, algae, diatoms, mosses, liverworts, hornworts, and vascular plants), both living and fossil. Phytotaxa was founded in 2009 as botanical sister journal to Zootaxa. It has a large editorial board, who are running this journal on a voluntary basis, and it is published by Magnolia Press (Auckland , New Zealand). It is also indexed by SCIE, JCR and Biosis. All types of taxonomic, floristic and phytogeographic papers are considered, including theoretical papers and methodology, systematics and phylogeny, monographs, revisions and reviews, catalogues, biographies and bibliographies, history of botanical explorations, identification guides, floras, analyses of characters, phylogenetic studies and phytogeography, descriptions of taxa, typification and nomenclatural papers. Monographs and other long manuscripts (of 60 printed pages or more) can be published as books, which will receive an ISBN number as well as being part of the Phytotaxa series.