Abstract The information concerning the origin, biogeography and dispersal mechanisms of sphaeriid species in the Holarctic region is very limited. In this study, we report on the first occurrence of Euglesa globularis in the Magadan Oblast. According to our molecular data, 16S RNA sequences of E. globularis are represented by two haplotypes, one of which is identical with the samples that were collected in North America. Our findings highlight the possible exchange between the freshwater biotas of North-West Asia and the West of North America in Beringia during the Pleistocene. Furthermore, we describe the first case of bivalve mollusk E. globularis attached to toes of the amphibian species Salamandrella keyserlingii. According to our data, S. keyserlingii could play a minor role in the dispersal of bivalves at the local scale.

中文翻译：

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软体动物物种 Euglesa globularis（Clessin，1873 年）在东北亚（俄罗斯马加丹）的出现以及有关传播机制和媒介的数据

摘要 关于全北极地区球状物种的起源、生物地理学和传播机制的信息非常有限。在这项研究中，我们报告了马加丹州首次出现的球虫。根据我们的分子数据，E. globularis 的 16S RNA 序列由两种单倍型表示，其中一种与在北美收集的样本相同。我们的研究结果强调了更新世期间西北亚和北美洲西部在白令岛的淡水生物群之间可能的交换。此外，我们描述了第一例双壳类软体动物 E. globularis 附着在两栖动物 Salamandrella keyerlingii 的脚趾上。根据我们的数据，S.keyserlingii 可能在当地规模的双壳类扩散中发挥次要作用。