Molecular assessment of specimens previously assigned to Cirrulicarpus (Kallymeniaceae, Rhodophyta) in Brazil, with the description of Meredithia dichotoma sp. nov.
Luanda Pereira Soares, Silvia M.P.B. Guimarães, Mutue Toyota Fujii
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引用次数: 0
Abstract
ABSTRACTMolecular sequence analyses of specimens previously identified as Cirrulicarpus sp. in the southeastern Brazil (Espírito Santo coast), indicated that they are more closely related to the genus Meredithia than to the genus Cirrulicarpus. The new species Meredithia dichotoma is herein proposed to accommodate this uncommon and endemic taxon, morphologically characterized by an erect, narrow, strap-shaped thallus, up to 16 cm long, mostly dichotomously branched, with regular constrictions, densely to moderately filamentous medulla, with occasional ganglionic cells, and an expanded medullary region in the basal transverse sections, resembling a midrib in surface view. The species is also supported by the sequence divergence from its congeners: ≥4.3% and 2.2% in the COI-5P and rbcL markers, respectively. Meredithia dichotoma differs from other 11 species of the genus by its dimensions and general habit, never forming expanded blades. This is a new genus record for Brazil and the first species of Meredithia known to occur in the western South Atlantic, increasing the known diversity in the red algal family Kallymeniaceae.KEYWORDS: COI-5PGigartinalesMolecular phylogenyrbcLRhodoliths bedsTaxonomy ACKNOWLEDGEMENTSWe thank Feresa Cabrera for providing sequences of Meredithia hawaiiensis, and Gary Saunders by sequences of Commanderella, Hommersandia and Velatocarpus. LPS thanks the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Bolsista CAPES/BRASIL 88887.515974/2020-00) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for Postdoctoral Fellowship (152282/2022-0). MTF thanks CNPq for the Productivity Fellowship (311195/2021-0).Supplementary materialSupplemental data for this article can be accessed online at https://doi.org/10.1080/00318884.2023.2241123DISCLOSURE STATEMENTNo potential conflict of interest was reported by the authors.Additional informationFundingThis study was partially supported by a research grant from Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP 2016/50370-7 and 2017/50341-0).
摘要对巴西东南部(Espírito Santo coast)的Cirrulicarpus sp.标本的分子序列分析表明,它们与Meredithia属的亲缘关系比Cirrulicarpus属的亲缘关系更近。本文提出的新物种Meredithia dichotoma是为了适应这种罕见的特有分类群,其形态学特征是直立,狭窄,带状状的菌体,长可达16厘米,大部分为二分分支,具有规则的收缩,密集至中等丝状的髓质,偶有神经节细胞,在基底横切面有一个扩大的髓质区域,表面上看类似中脉。COI-5P和rbcL标记的序列差异分别≥4.3%和2.2%,也支持了该物种。由它的尺寸和一般习性,从没有形成展开的叶片不同于其他11种的属。这是巴西的新属记录,也是已知出现在南大西洋西部的Meredithia的第一个物种,增加了红藻科Kallymeniaceae的已知多样性。关键词:coi - 5pgigartinales;分子系统发育学;rhodoliths床分类感谢Feresa Cabrera提供了Meredithia hawaiiensis的序列,Gary Saunders提供了Commanderella、Hommersandia和Velatocarpus的序列。LPS感谢Nível Superior (Bolsista CAPES/BRASIL 88887.515974/2020-00)和Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)的博士后资助(152282/2022-0)。MTF感谢CNPq提供的生产力奖学金(311195/2021-0)。补充材料本文的补充数据可在https://doi.org/10.1080/00318884.2023.2241123DISCLOSURE网站上获取。statement作者未报告潜在的利益冲突。本研究的部分资金由圣保罗州安帕罗基金(FAPESP 2016/50370-7和2017/50341-0)的研究经费支持。
期刊介绍:
Phycologia is published bimonthly by the International Phycological Society and serves as a publishing medium for information about any aspect of phycology. Membership in the Society is not necessary for publication. Submitted manuscripts cannot be previously published or submitted elsewhere. Copyright ownership of all accepted papers is held by the International Phycological Society.