厦门大学硅藻研究室的网页上查到的: 硅藻名称:Pleurosigma finmarchicum Grunow
分类法: Valves are solitary and slightly sigmoid especially near the tips. A central raphe also becomes sigmoidal near the ends of the valve. The raphe sternum is narrow and not centrally expanded (Tomas 1997). The striae are so fine that they can only be seen with Lihgt Microscope on cleaned diatoms mounted in a medium of highrefractive index. Cells are 300-600 um long and 40-75 um wide. There are 28-30 transverse striae in 10 um.