| 摘要: |
| 本文为我国西沙群岛现代有孔虫研究报告的第二部分。
笔者在《西沙群岛的现代有孔虫Ⅰ》一文中已报道了175种。本文共记述了底栖有孔虫240种(包括6个未定种)，其中的235种为首次记录，分隶于3亚目，10总科，38科，110属;有8个新属和86个新种。砂质胶结型种类有31种，占总种数的13.2%；钙质无孔型种类有48种，占总种数的20.4%；钙质有孔型种类有156种，占总种数的66.4%；浮游有孔虫未见有新增加的种类。凡是在前文己报道过的属以及本文重复报道的5个种，均不再加以描述。新种的模式标本均保存于中国科学院海洋研究所。
通过本文对现有的56份砂样所含有孔虫的分析鉴定，可以看出西沙群岛的有孔虫区系是极其丰富的。随着今后更全面的调查，特别是水下样品的进一步补充采集，待发现其他种类时，将另文报道。 |
| 关键词: 现代有孔虫 西沙群岛 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院海洋研究所调查研究报告第433号 |
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| THE RECENT FORAMINIFERA OF THE XISHA ISLANDS, GUANGDONG PROVINCE, CHINA.Ⅱ |
|
Zheng Shouyi
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Institute of Oceanology, Academia Sinica
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| Abstract: |
| This is the second part of our study on the foraminiferal fauna of the Xisha Islands. The material upon which this study is based come from three batches of 56 samples collected during the years 1974-1976 from eighteen islands representing diverse environments;The majority of the samples. were collected from the littoral zone while a few were collected underwater ranging in depths of from a few meters to fifty meters. A total of 235 species belonging to 38 families and 110 genera is added to the previously recorded 175 species. Eight genera and 86 species are considered as new. There is a marked increase in members of the superfamilies Nodosariacea, Buliminacea and Spirillinacea，as a result of, which calcareous perforate species amounted to 66.4%. The calcareous imperforate species although not .as predominant as in the first batch of samples collected in 1957, still make up 20.4%. The remaining 13.2% is made up of arenaceous-agglutinated species.
It is to be expected that with continued and more extensive collections from new localities and with the acquisition of more underwater samples of various depths, many more species are to be added to the foraminiferal fauna of these islands. |
| Key words: foraminiferal fauna Xisha Island |
