Liang Chen, Wang Wei, Dong Liang, Mukhtar Irum, Wang Fengping, Chen Jianming
Institute of Oceanography, Minjiang University, Fuzhou, China.
School of Oceanography, Shanghai Jiao Tong University, Shanghai, China.
Front Microbiol. 2021 Oct 20;12:743920. doi: 10.3389/fmicb.2021.743920. eCollection 2021.
A new species of , isolated from the deep-sea Pacific Ocean (>3,000-m depth) in the vicinity of the Mariana Trench, is described based on morphological and molecular data. The systematic status of the ciliate genus has long been highly ambiguous, and species have been assigned to an independent class until recently. In the present study, we described sp. n. as a small (25-32 × 14-17 μm ) drop-shaped ciliate, with longitudinal furrows along the ciliary rows on the right side, six adoral membranelles, eight somatic kineties, and one macronucleus comprising 7-11 nuclear globules. Phylogenetic analyses inferred from small subunit rRNA gene sequences revealed that seven species in the phylogenetic tree formed a fully supported clade representing an independent class. sp. n. was established to be most closely related to , with a sequence similarity of 96.64%, and was found to be able to survive at both atmospheric pressure and hydrostatic pressure of 320 bar, thereby indicating effective barotolerance.
基于形态学和分子数据，描述了一种从马里亚纳海沟附近的太平洋深海（深度>3000米）分离出的新物种。纤毛虫属的系统地位长期以来一直非常模糊，直到最近其物种才被归入一个独立的纲。在本研究中，我们将新物种描述为一种小型（25 - 32×14 - 17μm）水滴形纤毛虫，右侧纤毛排有纵向沟纹，有六个口围小膜、八列体动基列以及一个由7 - 11个核小球组成的大核。从小亚基rRNA基因序列推断的系统发育分析表明，系统发育树中的七个物种形成了一个得到充分支持的分支，代表一个独立的纲。新物种与某物种关系最为密切，序列相似性为96.64%，并且发现它能够在大气压和320巴的静水压力下存活，从而表明其具有有效的耐压性。
