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首页> 外文期刊>Algae >Morphology and taxonomy of the planktonic diatom Chaetoceros species (Bacillariophyceae) with special intercalary setae in Korean coastal waters
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Morphology and taxonomy of the planktonic diatom Chaetoceros species (Bacillariophyceae) with special intercalary setae in Korean coastal waters

机译：韩国沿海水域浮游性硅藻Chaetoceros（Bacillariophyceae）具特殊cal科的形态和分类学

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Species of the diatom genus Chaetoceros with special intercalary setae are uncommon. For this study, we collected Chaetoceros species from August 2008 to September 2009 in Korean coastal waters and examined the ultra structures of the Chaetoceros species C. coarctatus, C. compressus var. hirtisetus, C. contortus, C. diversus, and C. messanensis, using light and scanning electron microscopy. C. coarctatus, in the subgenus Phaeoceros, showed longer and stronger spines than those found in other species. C. coarctatus and C. diversus had special intercalary setae with spines in straight arrangements, whereas C. compressus var. hirtisetus, C. contortus, and C. messanensis had special intercalary setae with spines arranged in spirals. The setae of C. coarctatus had spines that were robust toward the tips and, overall, longer and stronger than were those of other species. C. coarctatus and C. diversus were straight, and C. compressus var. hirtisetus, C. contortus, and C. messanensis spiraled. C. messanensis had two types of special intercalary setae, both forked: 1 with spines in spirals and 1 lacking spines. We did not find spines on the anterior part of divergent point of the special intercalary setae of C. messanensis. Foramina shapes of these 5 Chaetoceros species varied as follows: very small or no foramina in C. coarctatus, relatively wide and slightly centrally constricted foramina in C. compressus var. hirtisetus and C. contortus, quite narrowly slitted or no foramina in C. diversus, and lanceolate or hexagonal foramina in C. messanensis. We found rimoportula in both intercalary and terminal valves of C. coarctatus, but C. compressus var. hirtisetus, C. contortus, C. diversus, and C. messanensis only had rimoportula in terminal valves. In addition, C. compressus var. hirtisetus and C. contortus were new to Korean coastal waters.
机译：具有特殊cal间刚毛的硅藻属Chaetoceros属的物种并不常见。在这项研究中，我们收集了2008年8月至2009年9月在韩国沿海水域中的Chaetoceros物种，并检查了Chaetoceros物种C. coarctatus，C。compressus var的超微结构。使用光和扫描电子显微镜观察hirtisetus，C。contortus，C。diversus和C. messanensis。在Phaeoceros属下的C. coarctatus表现出比其他物种更长且更强的棘突。 C. coarctatus和C. diversus具特殊的cal间刚毛，刺直排列，而C. compressus var。 hirtisetus，C。contortus和C.messanensis有特殊的cal间刚毛，具刺成螺旋状排列。 C. coarctatus的刚毛具有坚硬的顶端，并且总体上比其他物种长且结实。 C. coarctatus和C. diversus是直的，而C. compressus var。 hirtisetus，C。contortus和C.messanensis螺旋上升。 C. messanensis有两种类型的特殊cal间刚毛，都分叉：1具螺旋状的棘，而1具无棘。我们没有在梅氏梭菌特殊cal间刚毛发散点的前部找到刺。这5个Chaetoceros物种的孔板形状变化如下：在C. coarctatus中孔板很小或没有孔，在C. compressus var中孔板相对较宽且中央收缩。 hirtisetus和C. contortus，在C. diversus中狭缝很窄或没有孔，而在C. messanensis中是披针形或六角形。我们发现在C. coarctatus的中间和末端瓣中都有轮缘门，但是C. compressus var。。 hirtisetus，C。contortus，C。diversus和C. messanensis仅在末端瓣膜中有rimoportula。此外，C。compressus var。 hirtisetus和C. contortus对韩国沿海水域来说是新的。

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