Zhou Le, Chen Tao
Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin, 541199, PR China.
College of Basic Medicine, Guilin Medical University, Guilin, 541199, PR China.
Int J Parasitol Parasites Wildl. 2024 Dec 11;26:101034. doi: 10.1016/j.ijppaw.2024.101034. eCollection 2025 Apr.
To investigate the infection of fish of the genus by (Monogenea) parasites in the karst region of Yunnan (Southwest China), individuals were obtained from the rare and vulnerable host black loach . Based on morphology and partial internal transcribed spacer (ITS) sequence data, we identified and described a new species n. sp. Obtained from the fins of from Yunnan Province, Southwest China. Of all available gyrodactylid sequences, the ITS fragment obtained has the highest similarity (88.3%) to the same part of the rDNA of . The prevalence and mean intensity were 100% and 11.9, respectively. The morphological comparison of the similar haptoral structures revealed slight differences between the new species and the five species found in the hosts of Nemacheilidae, and the marginal hooks were compared with the 18 species found in the hosts of Nemacheilidae. In particular, . n. sp. has robust, long, and straight hamuli with inclined roots, the lingulate ventral bar membrane, a short marginal sickle with a blunt marginal hook toe of marginal hooks, and an oval male copulatory organ (MCO). n. sp. is the first species isolated from Furthermore, phylogenetic analyses showed that the new species is a new member of the subgenus ().
为调查中国西南部云南省喀斯特地区鱼类感染三代虫（单殖吸虫纲）寄生虫的情况，从珍稀易危宿主黑斑条鳅获取了个体。基于形态学和部分内转录间隔区（ITS）序列数据，我们鉴定并描述了一个新物种——云南三代虫新种。该新种采自中国西南部云南省黑斑条鳅的鳍。在所有可得的三代虫序列中，所获得的ITS片段与杜氏三代虫rDNA的相同部分具有最高相似度（88.3%）。感染率和平均感染强度分别为100%和11.9。对相似的钩器结构进行形态学比较，发现新物种与在条鳅科宿主中发现的五个三代虫物种之间存在细微差异，并将边缘小钩与在条鳅科宿主中发现的18个三代虫物种进行了比较。特别是，云南三代虫新种具有粗壮、长且直的小钩，其根部倾斜，腹杆膜呈舌状，边缘小钩的边缘镰刀短，边缘钩尖钝，以及椭圆形雄性交配器。云南三代虫新种是首个从黑斑条鳅分离出的三代虫物种。此外，系统发育分析表明，该新物种是副三代虫亚属（杜氏三代虫）的一个新成员。
