Laboratory of Protozoological Biodiversity and Evolution in Wetland, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, China; Key Laboratory for Space Bioscience and Biotechnology, Institute of Special Environmental Biophysics, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China.
Laboratory of Protozoological Biodiversity and Evolution in Wetland, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, China.
Eur J Protistol. 2021 Apr;78:125766. doi: 10.1016/j.ejop.2021.125766. Epub 2021 Jan 21.
The morphology, morphogenesis and molecular phylogeny of a new saline soil hypotrich ciliate, Uroleptoides salina nov. spec., discovered from China, was investigated. The new species is characterized as follows: body 150-215 × 40-50 μm in vivo, slender and highly flexible; usually four ellipsoidal macronuclear nodules; contractile vacuole absent; cortical granules absent; endosymbiotic algae present; amphisiellid median cirral row consists of 14-25 cirri and terminates about 47% down length of body; usually three buccal cirri and 3-13 cirri left of anterior portion of amphisiellid median cirral row; 3-5 transverse cirri. Morphogenesis during binary fission is characterized by: (1) the parental adoral zone of membranelles is retained completely, parental paroral contributes to the formation of the undulating membranes anlage for the proter; (2) the oral primordium of the opisthe is formed apokinetally; and (3) the amphisiellid median cirral row is formed from two anlagen. Phylogenetic analyses based on SSU rDNA sequence data show that Uroleptoides salina nov. spec. has a close relationship with its morphologically similar species, U. longiseries, U. magnigranulosus, Orthamphisiella breviseries, and Parabistichella variabilis.
从中国发现的一种新的盐土内毛目纤毛虫，Uroleptoides salina nov. spec. 的形态、形态发生和分子系统发育进行了研究。该新种的特征如下：活体体长 150-215×40-50μm，细长且高度灵活；通常有四个椭圆形的大核小结；无伸缩泡；无皮质颗粒；存在内共生藻类；前口缘纤毛列中的双联体中线纤毛由 14-25 根纤毛组成，终止于体长的约 47%处；通常有三个口围纤毛和前口缘双联体中线纤毛列左侧的 3-13 根纤毛；有 3-5 根横纤维。二分分裂期间的形态发生特征为：（1）亲代口前区纤毛环完全保留，亲代口侧体有助于前口部波动膜原基的形成；（2）后口部口原基的形成是向心的；（3）双联体中线纤毛列由两个原基形成。基于 SSU rDNA 序列数据的系统发育分析表明，Uroleptoides salina nov. spec.与形态相似的物种 U. longiseries、U. magnigranulosus、Orthamphisiella breviseries 和 Parabistichella variabilis 关系密切。
