Jung Jae-Ho, Cho Joung, Jang Yoon Hye, Gil Dong Yuen
Department of Biology, Gangneung-Wonju National University, Gangneung, South Korea.
Institute of Science-Gifted Education, Gangneung-Wonju National University, Gangneung, South Korea.
Eur J Protistol. 2018 Feb;62:69-78. doi: 10.1016/j.ejop.2017.11.003. Epub 2017 Nov 28.
In a study to investigate ciliate diversity, we discovered a new soil ciliate. Holostichides terrae nov. spec. was examined and identified based on observations of living cells and stained specimens. In addition, the nuclear SSU rRNA gene along with morphology was analyzed to infer its phylogenetic position. The new species closely resembles H. dumonti, but can be distinguished by the morphology of the pharynx (with rod-shaped structure vs. lacking) and the number of frontoterminal cirri (invariably two vs. usually more than two). Molecular analyses indicate that the genus Holostichides is not monophyletic, and H. terrae is closely related with the genera Birojimia and Hemicycliostyla, both of which have a pharynx with rod-shaped structures, as also seen in H. terrae.
在一项调查纤毛虫多样性的研究中，我们发现了一种新的土壤纤毛虫。新种土栖全列虫（Holostichides terrae nov. spec.）基于对活细胞和染色标本的观察进行了检查和鉴定。此外，分析了核小亚基核糖体RNA基因以及形态，以推断其系统发育位置。新物种与杜氏全列虫（H. dumonti）非常相似，但可以通过咽的形态（有杆状结构与无杆状结构）和额端纤毛的数量（总是两根与通常多于两根）来区分。分子分析表明，全列虫属不是单系的，土栖全列虫与比罗吉米虫属（Birojimia）和半环柱虫属（Hemicycliostyla）密切相关，这两个属都有带杆状结构的咽，土栖全列虫也是如此。
