Abstract

Representatives of the bivalve genus Unionites Wissmann are found in the Upper Permian deposits of Northeast Russia, together with the typical high-Boreal Inoceramus-like bivalves Intomodesma sp. Previously, Unionites had been considered exclusively Triassic–Early Jurassic and were only recently found in the Upper Permian of Italy. The finding of representatives of the genus Unionites in the Boreal Upper Permian indicate increased connections of high-Boreal basins and Tethys Superrealm towards the end of the Permian, which began as early as the Middle and Late Wuchiapingian. A new species U. kobyumensis Biakov is described.

中文翻译：

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Unionites Wissmann (Bivalvia) 在俄罗斯东北部北部二叠纪的首次记录

摘要

在俄罗斯东北部的上二叠纪矿床中发现了双壳类Unionites Wissmann属的代表，以及典型的高北方Inoceramus样双壳类Intomodesma sp。以前，尤尼翁岩被认为完全是三叠纪-早侏罗纪，直到最近才在意大利的上二叠纪发现。属代表的发现Unionites在北方上二叠统对表示二叠纪，这早在晚唐吴家坪开始期末增加高北方盆地和特提斯Superrealm的连接。描述了一个新物种U. kobyumensis Biakov。