School of Marine Sciences, Ningbo University, Ningbo 315800, China.
Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
Int J Mol Sci. 2022 Feb 3;23(3):1764. doi: 10.3390/ijms23031764.
Three species, Claparède & Lachmann, 1859; Faria et al., 1922; and n. sp., were collected from subtropical coastal waters of the East China Sea, near Ningbo, China. The three species were studied based on their living morphology, infraciliature, and molecular data. The new species n. sp. is very similar to in most morphological features except the preoral kinety, which is double-rowed in the new species (vs. single-rowed in ). The difference in the small ribosomal subunit sequences (SSU rDNA) between these two species is 56 bases, supporting the establishment of the new species. The Ningbo population of is highly similar in morphology to other known populations. Nevertheless, the SSU rDNA sequences of these populations are very different, indicating high genetic diversity and potentially cryptic species. is cosmopolitan with many described populations worldwide and four deposited SSU rDNA sequences. The present work supplies morphological and molecular information from five subtropical populations of that bear identical molecular sequences but show significant morphological differences. The findings of this study provide an opportunity to improve understanding of the morphological and genetic diversity of ciliates.
三种物种，Claparède 和 Lachmann，1859 年；Faria 等人，1922 年；以及新种，均采集自中国东海宁波附近的亚热带沿海水域。这三种物种是根据其活体形态、纤毛结构和分子数据进行研究的。新种 n. sp. 在大多数形态特征上与非常相似，但口前纤毛列不同，新种为双行（而在中为单行）。这两个物种的小核糖体亚单位序列（SSU rDNA）之间的差异为 56 个碱基，支持建立新种。宁波种群在形态上与其他已知种群非常相似。然而，这些种群的 SSU rDNA 序列差异很大，表明遗传多样性高，可能存在隐种。是世界性的，在全球有许多描述的种群，并有四个已存入的 SSU rDNA 序列。本工作提供了来自五个亚热带种群的形态学和分子信息，这些种群具有相同的分子序列，但表现出显著的形态差异。本研究的发现为提高对纤毛虫形态和遗传多样性的认识提供了机会。
