Abstract—

Similarity analysis of the taxonomic composition of the 13 major localities for Vendian macrofossils worldwide is performed using the Ochiai coefficient. There are two distinct subgroups among shallow-marine localities. The first subgroup includes Australia, the southeastern White Sea area, Podolia, India, and the Urals (degree of similarity 0.16–0.38). The second subgroup includes localities of Siberia, Northwest Canada, South China, South America, Southern Namibia, and the United States (degree of similarity up to 0.58). Such a division of the shallow-marine localities corresponds to the distribution of carbonate sediments and of the tubular problematic species Cloudina. This division is probably climate-related; i.e., localities of the second subgroup are associated with warm-water conditions (precipitation of carbonates, distribution of problematic remains with a carbonate skeleton), while the localities of the first subgroup are associated with cold-water conditions. Thus, the analysis performed indicates the location of the Australia, Baltica, and India cratons at high latitudes (which differs from the results demonstrated in some paleotectonic reconstructions based on paleomagnetic studies) and confirms the hypothesis that the Siberian Platform was located at tropical and subtropical latitudes. Accordingly, two paleobiogeographic realms are identified for the Late Vendian: the Subpolar Realm (Australia, Baltica, and India) and the Equatorial Realm (Siberia, Laurentia, Kalahari, South China, and Rio de la Plata).

中文翻译：

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晚Vendian大型化石组合的古地理分析

摘要—

使用Ochiai系数，对全球Vendian大型化石的13个主要地区的生物分类组成进行了相似性分析。在浅海地区之间有两个不同的亚组。第一组包括澳大利亚，东南部白海地区，印度的波多利亚和乌拉尔（相似度为0.16-0.38）。第二个子组包括西伯利亚，加拿大西北部，华南，南美，南纳米比亚和美国（相似度最高为0.58）。浅海区域的这种划分对应于碳酸盐沉积物和管状有问题物种Cloudina的分布。这种划分可能与气候有关；即，第二子组的位置与温水条件（碳酸盐的沉淀，有碳酸盐骨架的有问题的残骸的分布）有关，而第一子组的位置与冷水条件有关。因此，所进行的分析表明了澳大利亚，波罗的海和印度克拉通的位置在高纬度（这与基于古地磁研究在某些古构造重建中显示的结果不同），并证实了西伯利亚平台位于热带和亚热带的假设纬度。因此，已为晚文迪亚时期确定了两个古生物地理领域：亚极领域（澳大利亚，波罗的海和印度）和赤道领域（西伯利亚，劳伦蒂亚，卡拉哈里，华南，