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首页> 外文期刊>European Journal of Phycology >Pleurosigma guarreranum, sp. nov. (Pleurosigmataceae, Bacillariophyta), from the Gulf of San Matias, Argentina, and comparison with the allied species Pleurosigma exemptum and P. obesum
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Pleurosigma guarreranum, sp. nov. (Pleurosigmataceae, Bacillariophyta), from the Gulf of San Matias, Argentina, and comparison with the allied species Pleurosigma exemptum and P. obesum

机译：侧柏（Pleurosigma guarreranum），sp。十一月（Pleurosigmataceae，Bacillariophyta），来自阿根廷圣马蒂亚斯湾，并与盟友Pleurosigma exemptum和P. obesum进行比较

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摘要

A new marine diatom, Pleurosigma guarreranum Sar, Sterrenburg & Sunesen, sp. nov., is described with light and electron microscopy from material collected in coastal waters of the Gulf of San Matias, Rio Negro Province, Argentina. Pleurosigma guarreranum resembles P. exemptum and P. obesum from the Philippines. Isotypes of P. exemptum and P. obesum deposited in the Albert Mann Collection, National Museum of Natural History, Smithsonian Institution (US), were examined with light microscopy. The observations supported a previous suggestion to include P. obesum as a heterotypic synonym of P. exemptum, which has priority. Since there is no available unmounted original material of P. exemptum, a comparative light microscopical analysis of P. guarreranum and the type material of P. exemptum was made. Despite some similarities, there are subtle differences in morphometric data, valve outline, raphe sternum pattern, and morphology of the central area. But especially, the two species consistently differ in the angle of intersection of the oblique striae, justifying a separate taxonomic position. Pleurosigma guarreranum was also compared with another species belonging to the section Formosi, P. decorum, similar in valve outline, raphe sternum pattern and angle of intersection of the oblique striae.
机译：一种新的海洋硅藻，Pleurosigma guarreranum Sar，Sterrenburg＆Sunesen，sp。用光电子显微镜观察了从阿根廷里约内格罗省圣马蒂亚斯湾沿海水域收集到的材料制成的nov。番石榴（Pleurosigma guarreranum）类似于来自菲律宾的免除假单胞菌（P. exemptum）和白僵菌（P. obesum）。用光学显微镜检查了保存在史密森尼学会（美国）国家自然历史博物馆阿尔伯特·曼收藏中的免除体育假单胞菌和玫瑰假单胞菌的同种型。观察结果支持以前的建议，即将虾青冈作为免除青霉的异型同义字，这具有优先权。由于没有可用的未安装过的P. exemptum原始材料，因此进行了对P. guarreranum和P. exemptum的典型材料的比较光学显微镜分析。尽管有一些相似之处，但形态数据，瓣膜轮廓，胸骨胸骨图案和中心区域的形态仍存在细微差异。但尤其是，这两个物种在斜纹的相交角上始终不同，从而证明了单独的分类位置。还将侧柏（Pleurosigma guarreranum）与隶属于Formosi，P。decorum的另一种物种进行了比较，在瓣膜轮廓，斜纹胸骨图案和斜纹的相交角方面相似。

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