In a study on ciliate diversity, we discovered the new hypotrich species, Gonostomum jangbogoensis n. sp., in freshwater from Terra Nova Bay, Victoria Land, southeast Antarctica. We describe its morphology and morphogenesis using standard methods, and the SSU rRNA gene phylogeny is provided as well. Morphology of Gonostomum jangbogoensis n. sp. is characterized as follows: slender to elongated body shape; grayish under low magnification; cortical granules present; 32–41 adoral membranelles; 3 enlarged frontal cirri; 1 buccal cirrus; 2 frontoterminal cirri; 3 or 4 frontoventral cirral pairs, 2 pretransverse cirri, 6–7 transverse cirri; 13–19 left and 18–26 right marginal cirri; 17–23 paroral kinetids; 3 dorsal kineties; 3 caudal cirri; 2 macronuclear nodules with 1–3 micronuclei. The morphogenesis of the new species confirms that it has at least seven frontal-ventral-transverse cirral anlagen, which is also reported in Gonostomum sp. 1 sensu Shin from Korea. Even though these two populations occur very far from each other, the morphometric data prove that this character state, the seven cirral anlagen, is a stable feature across these populations and might be an apomorphy. The phylogenetic analyses show that the genus Gonostomum is non-monophyletic and that the new species is a sister to G. bromelicola.

在对纤毛虫多样性的研究中，我们发现了新的亚种，即淋菌（Gonostomum jangbogoensis n）。位于南极洲东南部维多利亚州土地的新星湾淡水中。我们使用标准方法描述其形态和形态发生，并提供SSU rRNA基因系统发育。剑柏属的形态。sp。其特征是：细长至细长的体形；低倍率下呈灰色；存在皮质颗粒；32-41条动脉膜；3个增大的额窦 1个颊卷; 2个额尾毛虫; 前额腹对3或4对，横行前2对，横行6-7；左边缘13-19和右边缘18-26；17-23个旁侧节肢动物；3背运动；3尾状毛虫; 2个具1–3个微核的大核结节。新品种确认其具有的形态至少七个额腹，横cirral原基，这也是在报道Gonostomumsp。1 sensu Shin来自韩国。尽管这两个种群彼此之间相距很远，但形态计量学数据证明，这种特征状态，即七个环状的anlagen，在这两个种群中是一个稳定的特征，可能是一种畸变。系统发育分析表明，Gonstomum属不是单系的，并且该新物种是G. bromelicola的姐妹。