219 Planktoniella blanda 具翼漂流藻 Phylum: Heterokontophyta 门：不等鞭毛門 Class: Mediophyceae 纲：中型硅藻綱 Order: Thalassiosirales 目：海鏈藻目 Family: Thalassiosiraceae 科：海鏈藻科 Morphology Cells are discoid. Valves possess relatively large areolae with lower density in the marginal area than that of center. Cells possess 3 to 6 wing-like organic extrusions from the girdle or form irregular ring-like extrusions. 形態 細胞圓盤狀，殼面篩室較大，邊緣處篩室密度小於中部區域。殼環面有3到6個有 機質翼狀突起，或者翼狀突呈不規則圓環狀。 Ecology and distribution Planktoniella blanda is a cosmopolitan planktonic species widely distributed in temperate to subtropical waters. Cells could also be observed in intertidal zone. 生態與分佈 具翼漂流藻是溫帶、亞熱帶廣布性浮游物種，但也在潮間帶有記錄。 Size Diameter (apical axis): 32 to 66 μm (Chin et al., 1965); 22 - 55 μm (Tomas, 1997); 45 μm (Guo et al., 2003); 36-74 μm (Yang et al., 2006)
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