小盘藻属，我国微型硅藻类的一个新记录属

高亚辉, 程兆第, 金德祥

Gao Ya-Hui, Cheng Zhao-Di, Jin De-Xiang (T. G. Chin)

Received:1900-01-01 Revised:1900-01-01 Online:1992-05-18 Published:1992-05-18
Contact: Gao Ya-Hui

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。

关键词: 小盘藻, 奇特小盘藻, 智利小盘藻, 细弱小盘藻

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 to

the margin.

Key words: Minidiscus trioculatus, M. comicus, M. chilensis, M. subtilis

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]. 中国科学院大学学报.

Gao Ya-Hui, Cheng Zhao-Di, Jin De-Xiang (T. G. Chin). Minidiscus, a New Recorded Nanodiatom Genus for China[J]. .

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