摘要
本文以Ａｌｂｉａｎ－Ｃａｍｐａｎｉａｎ的钙质超微化石为例，介绍了一种描述生物地理学研究的新方法──运用计算机绘制化石种的分布图（包括平面图和立体图两种），并运用这一方法对该时间段的近２００个种进行了具体研究，归纳出六种分布类型，即：广布型，南半球分布型，北半球分布型，赤道海域缺失型，赤道海域分布型，迁移型。并且对每个种在这一时间段中的分布作了具体阐述。
Here introduced is a new method in descriptive biogeography. Computer is used to make charts (including plane figures and stereograms showing horizontal and vertical distributions of species,from which characteristics in species distribution can be easily read.About 200 Cretaceous calcareous nannofossil species have been studied with this new method.Six distribution types can be distinguished according to the chart:(1) Cosmopolitan type;(2)Southern Hemisphere type;(3)Northern Hemisphere type;(4)Middle and high-latitude type;(5) Low-latitude type and(6)Migrating type.A detailed description is given on the distribution of each species.
出处
《微体古生物学报》
CSCD
北大核心
1995年第2期145-157,共13页
Acta Micropalaeontologica Sinica
关键词
钙质超微化石
描述生物地理
生物地理学
calcareous nannofossil,descriptive biogeography,Albian-Campanian
