Shmakova Lyubov A, Karpov Sergey A, Malavin Stanislav A, Smirnov Alexey V
Institute of Physicochemical and Biological Problems in Soil Science, Russian Academy of Sciences, Institutskaya 2, 142290, Pushchino, Moscow Region, Russian Federation.
Zoological Institute, Russian Academy of Sciences, St. Petersburg 199034, Russian Federation; St. Petersburg State University, St. Petersburg 199034, Russian Federation.
Eur J Protistol. 2018 Apr;63:117-129. doi: 10.1016/j.ejop.2018.02.002. Epub 2018 Mar 3.
A new species, Phalansterium arcticum sp. n., was isolated from an 8580-year-old Arctic permafrost layer. This organism typically lives as a sedentary uniflagellated cell enclosed in a thin flexible mucilaginous sheath, but can form naked swimming cells and amoeboid cells with eruptive pseudopodia accompanied with the formation of short, filopodia-like projections. In an SSU rDNA phylogenetic tree, it robustly groups with other species of this genus. Along with a description of the species, we also add new details to the description of the cell division of Phalansterium and the feeding process in this organism.
一个新物种，北极盘变形虫（Phalansterium arcticum sp. n.），是从一个有8580年历史的北极永久冻土层中分离出来的。这种生物体通常以包裹在薄而柔韧的黏液鞘中的静止单鞭毛细胞形式存在，但也可以形成裸露的游动细胞和具有爆发性伪足的变形虫细胞，并伴有短的丝状伪足状突起的形成。在小亚基核糖体DNA（SSU rDNA）系统发育树中，它与该属的其他物种紧密聚类。除了对该物种的描述外，我们还为盘变形虫的细胞分裂和该生物体的摄食过程的描述增添了新的细节。
