Yu Pan, You Qingmin, Bi Yonghong, Wang Quanxi
College of Life Sciences, Shanghai Normal University, Shanghai 200234, China Shanghai Normal University Shanghai China.
Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China Institute of Hydrobiology, Chinese Academy of Sciences Wuhan China.
PhytoKeys. 2022 Aug 12;204:97-108. doi: 10.3897/phytokeys.204.89690. eCollection 2022.
A new freshwater diatom species, Yu, You & Wang, from Sichuan Province, China, is described. The morphology of this species was analyzed with scanning electron microscopy (SEM) and light microscopy (LM). belongs to the -like subgroup, which has external distal raphe ends curved in opposite directions of the valve. The main characteristics of are its linear shape, rounded apices and transpically-elongated areolae on the both valves. The central area is well defined with one or two spaced striae of the raphe valve. And on the internal valve, areolae are occluded by hymens perforated by delicate slits, and each hymen is closely joined with the adjacent hymen. We compared the new species with other similar species of , is considered to be sufficiently different from other similar species based on valve outline, shape of the axial and center areas, and striae density. The new species is known only from its type locality, a mountain lake in Kangding County.
描述了一种来自中国四川省的新淡水硅藻物种，由Yu、You和Wang发现。利用扫描电子显微镜（SEM）和光学显微镜（LM）对该物种的形态进行了分析。它属于类似 - 样的亚组，其外部远端缝端在瓣的相反方向弯曲。该物种的主要特征是其线性形状、圆形顶端以及两个瓣上横向拉长的网纹。中心区域界限分明，具一个或两个间隔开的缝瓣条纹。在内瓣上，网纹被由精细狭缝穿孔的膜封闭，且每个膜与相邻膜紧密相连。我们将新物种与其他类似的 物种进行了比较，基于瓣轮廓、轴向和中心区域的形状以及条纹密度，该新物种被认为与其他类似物种有足够的差异。该新物种仅在其模式产地被发现，即康定县的一个山间湖泊。
