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首页> 外文期刊>Phycological Research >Taxonomic re-examination of Japanese Halimeda species using genetic markers, and proposal of a new species Halimeda ryukyuensis (Bryopsidales, Chlorophyta)
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Taxonomic re-examination of Japanese Halimeda species using genetic markers, and proposal of a new species Halimeda ryukyuensis (Bryopsidales, Chlorophyta)

机译：使用遗传标记对日本哈利美达（Halimeda）物种进行分类重新检查，并提出一种新物种琉球（Halimeda ryukyuensis）（Bryopsidales，Chlorophyta）

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摘要

In order to elucidate the biodiversity of Japanese Halimeda species, we investigated molecular phylogenetic relationships using tufA and rbcL DNA sequences, and the occurrence of 9 of the 11 species previously reported in Japan was confirmed (i.e., H.borneensis, H.cuneata, H.discoidea, H.distorta, H.kanaloana, H.macroloba, H.opuntia, H.renschii and H.velasquezii). In addition, H.minima, which has not been recorded in Japan, as well as an undescribed taxon, were noticed at Okinawa Island, Okinawa, Japan. The undescribed taxon was genetically closest to H.lacunalis, but distinct from that species in having much smaller thalli, with elliptical segments and turbinate peripheral utricles. It appears to belong to the section Halimeda in the morphology of the segments, but differs from related taxa such as H.taenicola and H.tuna in its considerably smaller size and in showing fusion between the adjacent peripheral utricles. Therefore, we describe a new species Halimeda ryukyuensis sp. nov. In addition, based on morphological re-examination of the type specimen of H.lacunalis, we suggest emendation of the description of the species as having siphons completely fused in pairs or triplets at the nodes.
机译：为了阐明日本哈利门达物种的生物多样性，我们使用了tufA和rbcL DNA序列调查了分子系统发育关系，并确认了先前在日本报道的11种物种中9种的发生（即H.borneensis，H.cuneata，H迪斯科迪亚（D.iscodica），畸形杆菌（H.distorta），卡纳罗阿娜（H.kanaloana），大果拟南芥（H.macroloba），仙人掌（H.opuntia），伦氏假单胞菌（H.renschii）和维拉克斯奎（H.velasquezii）。此外，在日本冲绳的冲绳岛上发现了在日本尚未记录的H.minima以及未描述的分类单元。未描述的分类单元在遗传上最接近幽门螺杆菌，但与该物种不同的是，其沙眼小得多，具有椭圆节段和鼻甲周围的鼻甲。它在节段的形态上似乎属于Halimeda断面，但与相关的分类单元（如H.taenicola和H.tuna）相比，其尺寸明显较小，并且显示出相邻外围小囊之间的融合。因此，我们描述了一个新物种Halimeda ryukyuensis sp。十一月此外，基于形态学检查的H.lacunalis型标本，我们建议对该物种的描述进行修正，因为其虹吸管在结节处完全成对或三胞胎完全融合。

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