| 小盘藻属，我国微型硅藻类的一个新记录属 |
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| 引用本文： | 高亚辉,程兆第,金德祥.小盘藻属，我国微型硅藻类的一个新记录属[J].中国科学院研究生院学报,1992,30(3):273-276. |
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| 作者姓名： | 高亚辉 程兆第 金德祥 |
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| 摘 要： | 本文描述了我国首次记录的小盘藻属Minidiscus硅藻四种。主要特征是壳缘无环突起，壳面上
的支持突和1个唇形突均远离壳缘。小盘藻M．trioculatus，奇特小盘藻M．comicus和智利小盘藻M．chilensis为我国的新记录；细弱小盘藻M．subtilis为新种。它们的主要区别在于壳面花纹及支持突和唇形突排列方式的不同。
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| 关 键 词： | 小盘藻 奇特小盘藻 智利小盘藻 细弱小盘藻 |
Minidiscus, a New Recorded Nanodiatom Genus for China |
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| Gao Ya-Hui,Cheng Zhao-Di,Jin De-Xiang.Minidiscus, a New Recorded Nanodiatom Genus for China[J].Journal of the Graduate School of the Chinese Academy of Sciences,1992,30(3):273-276. |
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| Authors: | Gao Ya-Hui Cheng Zhao-Di Jin De-Xiang |
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| Institution: | Gao Ya-Hui,Cheng Zhao-Di,Jin De-Xiang (T. G. Chin) |
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| Abstract: | Minidiscus trioculatus, M. comicus and M. chilensis are new records for China, and
M. subtilis, is a new species. They differ from Thalassiosira species by their strutted processes
and one single labiate process being distant from valve margin and they differ from each oth-
er by their areola patterns on valves and distribution patterns of strutted processes and the
labiate process. A key to the species of Minidiscus is given.
Minidiscus subtilis Gao, Cheng et Chin sp. nov., figs 7-8
Valves disc-shaped, slightly concave in center, weakly silicified, 3.5-5.5μm in diameter.
Areola unequally radiate-striate, striae 8.5 / lμm. A narrow valve mantle without striae.
Three strutted processes and a single labiate process located in the central area of the valve.
Among them, one strutted process in the very center with the other two adjacent to it, form-
ing an isometric triangle with the labiate process between the two subcentral strutted pro-
cesses. Two small satellite pores in each base of the strutted processes. M. subtilis differs from
M. chilensis mainly by their radiate striae continuously distributed from the valve center tothe margin. |
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| Keywords: | Minidiscus trioculatus M comicus M chilensis M subtilis |
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