Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing, 401331, China.
Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), School of Life Sciences, Southwest University, Chongqing, 400715, China.
Parasitol Res. 2020 May;119(5):1493-1503. doi: 10.1007/s00436-020-06656-w. Epub 2020 Mar 17.
Three new myxosporeans of the genus Sphaeromyxa Thélohan 1892 were discovered from the coastal waters off Xiamen in the East China Sea and characterized based on morphological and SSU rDNA data. Sphaeromyxa photopectoralis sp. n. was described from Photopectoralis bindus, and Sphaeromyxa sebastisca sp. n. was described infecting both Sebastiscus marmoratus (type-host) and Scorpaenopsis cirrosa. These two species are morphologically consistent with the "balbianii" group, possessing straight myxospores and truncated ends, but are distinct from one another genetically and by myxospore dimensions. A third myxosporean infecting Siganus fuscescens was described as Sphaeromyxa xiamenensis sp. n., and this species is morphologically consistent with the "incurvata" group, bearing arcuate myxospores with rounded ends. The molecular phylogeny and estimated rRNA secondary structure suggest that marine sphaeromyxids are probably derived from freshwater myxidiids, and "incurvata" and "balbianii" groups might each represent independent evolutionary lineages. The present study also shows that S. limocapitis phylogenetically nested in "incurvata" group.
三种新的粘孢子虫，属球囊霉属，1892 年被发现于东海厦门沿海水域，基于形态学和 SSU rDNA 数据进行了描述。 Photopectoralis bindus 上发现的 Photopectoralis bindus 新种和感染 Sebastiscus marmoratus（模式宿主）和 Scorpaenopsis cirrosa 的 Sebastiscus marmoratus 新种，这两种在形态上与“balbianii”组一致，具有直的粘孢子和截断的末端，但在遗传和粘孢子尺寸上彼此不同。第三种感染 Siganus fuscescens 的粘孢子虫被描述为厦门球囊霉新种，该种在形态上与“incurvata”组一致，具有弧形的粘孢子和圆形的末端。分子系统发育和估计的 rRNA 二级结构表明，海洋球囊霉可能是从淡水粘孢子虫进化而来的，“incurvata”和“balbianii”组可能各自代表独立的进化谱系。本研究还表明，S. limocapitis 在系统发育上属于“incurvata”组。
