Plagiodinium ballux sp. nov. (Dinophyceae), a deep (36 m) sand dwelling dinoflagellate from subtropical Japan
Plagiodinium ballux sp. nov. (Dinophyceae), a deep (36 m) sand dwelling dinoflagellate from subtropical Japan
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Plagiodinium ballux sp. (Dinophyceae)，一种产自亚热带的深沙 (36 m) 甲藻
作者：
Norico Yamada;Mahmutjan Dawut;Ryuta Terada;T. Horiguchi
本文记述了日本鹿儿岛县竹岛附近一深海底(36 m)中发现的一种沙生甲藻--Plagodidium balux N.Yamada，Dawut，R.Terada&T.HOriguchi。该种为海鞘，表面上类似于原甲藻的种，但具有极小的上皮。细胞从卵圆形到圆形正方形不等，体积小(长15.0-22.5kb)，侧向扁平。膜板光滑，膜板排列(Po，1‘，0A，5“，5C，2S，5‴，0p，1”)与该属模式种--贝氏斜纹夜蛾相似。基于SSU rDNA和部分LSU rDNA的分子系统发育分析表明，甲藻与贝氏假单胞菌有较近的亲缘关系，但其大小和细胞形态可以清楚地区分出来。这一系列的形态和分子差异导致了这样的结论，即这种深底栖甲藻代表了斜纹藻属的一个新物种。
A new species of marine sand‐dwelling dinoflagellate, Plagiodinium ballux N. Yamada, Dawut, R. Terada & T. Horiguchi is described from a deep (36 m) seafloor off Takeshima Island, Kagoshima Prefecture, Japan in the subtropical region of the northwest Pacific. The species is thecate and superficially resembles species of Prorocentrum, but possesses an extremely small epitheca. The cell varies from ovoid to a rounded square, and is small (15.0–22.5 μm in length) and laterally compressed. The thecal plates are smooth and the thecal plate arrangement (Po, 1′, 0a, 5″, 5C, 2S, 5‴, 0p, 1″″) is similar to that of Plagiodinium belizeanum, the type species of the genus. Molecular phylogenetic analyses based on SSU rDNA and partial LSU rDNA reveal that the dinoflagellate is closely related to P. belizeanum, but it can be clearly distinguished by its size and cell shape. This suite of morphological and molecular differences leads to the conclusion that this deep benthic dinoflagellate represents a new species of the genus Plagiodinium.
影响因子：
6.5
作者：
Nylander, JAA;Ronquist, F;Nieves-Aldrey, JL
通讯作者：
Nieves-Aldrey, JL