Two brackish water amoebae have been isolated and studied from the benthic biotopes of the Chupa Inlet (Kandalaksha Bay, northwestern Russia). Both strains can be identified as new species of the genus Paramoeba (Amoebozoa, Dactylopodida, Paramoebidae) based on light microscopical characters, structure of microscales on the cell surface and molecular evidence based on the analyses of two genes, nuclear SSU rRNA and mitochondrial cytochrome c oxidase subunit 1 (COI). Paramoeba aparasomata n. sp. is of particular interest because this amoeba is permanently lacking a symbiotic Perkinsela-like organism (PLO) present in other species of Paramoeba and Neoparamoeba. The results obtained show that scaly dactylopodial amoebae lacking PLO are not necessarily members of Korotnevella. In particular, we suggest that Korotnevella nivo Smirnov, 1997, with microscales very similar to those of Paramoeba eilhardi and the species studied here in structure, may be in fact a member of Paramoeba. Molecular data on K. nivo have to be obtained and analysed to test this hypothesis. Based on our new results we emend the diagnosis of the genus Paramoeba to make it more fit to the current phylogenetic conception.

从丘帕湾（俄罗斯西北部的坎达拉克沙湾）底栖生物群落中分离并研究了两个微咸水的变形虫。根据光镜特征，细胞表面上的微尺度结构以及基于对两个基因（核SSU rRNA和线粒体细胞色素c的分析）的分子证据，这两种菌株都可以被鉴定为Paramoeba属的新种（Amoebozoa，Dactylopodida和Paramoebidae）。氧化酶亚基1（COI）。Paramoeba aparasomata ñ。sp。之所以特别感兴趣，是因为这种变形虫永久缺乏其他副生动物和新副生动物中存在的共生类Perkinsela样生物（PLO）。。获得的结果表明，缺乏PLO的鳞状拟鞭毛变形虫不一定是Korotnevella的成员。特别是，我们建议Korotnevella nivo Smirnov，1997，其微观尺度与Paramoeba eilhardi非常相似，这里所研究的物种在结构上实际上可能是Paramoeba的成员。K的分子数据。必须获得nivo并进行分析以检验该假设。基于我们的新结果，我们对Paramoeba属的诊断进行了改进，使其更适合当前的系统发育概念。