Kapraunia silviae (Rhodomelaceae, Rhodophyta), a new species from the South Atlantic Ocean

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-07-03 DOI:10.1515/bot-2023-0101

Jhullyrson O.F. de Brito, Valéria Cassano

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引用次数: 0

Abstract

Kapraunia is a genus recently segregated from Polysiphonia sensu lato, with only four species so far known. However, no species have been found on the South Atlantic coast. Recent collections in southwestern Brazil revealed specimens morphologically similar to Kapraunia spp. To investigate the identity of these specimens, we carried out a morphological and molecular study based on COI-5P and rbcL sequences. Phylogenetic analysis placed our samples within the genus Kapraunia as a new species with full support, described here as Kapraunia silviae sp. nov. K. silviae is recognizable by a combination of characters such as attachment by a basal disc and a prostrate system, branches developing laterally to the trichoblasts, 5–6 pericentral cells, rarely 4. The species differs from K. pentamera by the attachment form, segment proportions and tetrasporangial dimensions, and from K. schneideri by the number of pericentral cells, branch development and tetrasporangial arrangement. Re-examination of herbarium samples from Brazil in older collections also revealed misidentifications of K. silviae as “Carradoriella denudata”. This new species seems to be restricted to the Brazilian coast, being found only on the northern coast of São Paulo state. Our results reinforce the need for revision of Polysiphonia s.l. species on the Brazilian coast.

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Kapraunia silviae（红藻科，红藻属），南大西洋的一个新物种

Kapraunia 是最近从 Polysiphonia sensu lato 中分离出来的一个属，目前已知的只有四个物种。然而，在南大西洋沿岸还没有发现任何物种。为了研究这些标本的身份，我们根据 COI-5P 和 rbcL 序列进行了形态学和分子研究。系统进化分析将我们的样本归入 Kapraunia 属，成为一个完全支持的新物种，在此描述为 Kapraunia silviae sp.该种与 K. pentamera 的不同之处在于附着形式、裂片比例和四孢子囊尺寸，与 K. schneideri 的不同之处在于四孢子囊周围细胞的数量、分枝的发育和四孢子囊的排列。对标本馆收藏的巴西老样本的重新检查也发现了将 K. silviae 误认为 "Carradoriella denudata "的情况。这个新物种似乎仅限于巴西海岸，只在圣保罗州北部海岸发现。我们的研究结果加强了对巴西海岸 Polysiphonia s.l. 物种进行修订的必要性。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.