This study revisited the taxonomy and diversity of brown macroalgae within the Scytosiphonaceae family in French Polynesia, which had previously been recognized as encompassing only six species. Using the chloroplast and mitochondrial genes rbcL, psbA, and cox3 as molecular markers in conjunction with morpho-anatomical observations, we unveiled the presence of 11 species spanning six genera: Chnoospora minima, Colpomenia claytoniae, Co. sinuosa [groups IIIa and IIIb], Hydroclathrus rapanuii, H. tenuis, H. tilesii, Manzaea minuta, Pseudochnoospora implexa, Rosenvingea australis, and the newly described species R. polynesiensis sp. nov. and R. tahitiensis sp. nov. This encompasses the recognition of two previously unreported genera in this region: Manzaea and Pseudochnoospora. Sequences were successfully acquired for four taxa that had been documented previously, while the absence of sequences for H. clathratus and H. tumulis in French Polynesia raises queries about their presence in this region. With these additions, the total species count now stands at 13 (including H. clathratus and H. tumulis), one being an endemic species. The molecular-assisted alpha taxonomic approach used here allowed for a critical revision of the Scytosiphonaceae species checklist for French Polynesia. The diversity revealed in this region accounts for a substantial 20% of the family's global diversity. Additionally, our study presents an updated species-level phylogeny for the Scytosiphonaceae.

中文翻译：

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法属波利尼西亚 Scytosiphonaceae（Ectocarpales、Phaeophyceae）：采用分子和形态学相结合的方法研究其多样性和系统学

这项研究重新审视了法属波利尼西亚Scytosiphonaceae家族中棕色大型藻类的分类和多样性，该家族此前被认为仅包含六个物种。使用叶绿体和线粒体基因rbc L、psb A 和cox 3 作为分子标记，结合形态解剖学观察，我们揭示了跨越 6 个属的 11 个物种的存在：Chnoospora minima、Colpomeniaclaytoniae、Co.sinuosa [组 IIIa 和IIIb]、Hydrocathrus rapanuii、H. tenuis、H.tilesii、Manzaea minuta、Pseudochnoospora implexa、Rosenvingea australis和新描述的物种R.polynesiensis sp。十一月和R. tahitiensis sp。十一月这包括识别该地区两个以前未报告的属：Manzaea和Pseudochnoospora。成功获得了先前记录的四个类群的序列，而法属波利尼西亚缺乏H. clathratus和H. tumulis的序列，引发了人们对该地区是否存在它们的疑问。经过这些增加，物种总数现已达到 13 种（包括H. clathratus和H. tumulis），其中一种是特有物种。这里使用的分子辅助 α 分类方法允许对法属波利尼西亚的 Scytosiphonaceae 物种清单进行重要修订。该区域所揭示的多样性占该家族全球多样性的 20%。此外，我们的研究提出了Scytosiphonaceae的更新的物种水平系统发育。