222 Planktoniella sol 太陽漂流藻 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 solitary, Valves are flat discoid shape, surrounded by a wing-like weakly silicified expansion with radial rays. The diameters of central disk range from 30 to 180 μm and the entire cells are up to 360 μm in diameter. Areolae are large, hexagonal, arranged in radial to tangential rows. The density of areolae is 5-7 in 10 μm at the valve center, 7-8 midway to margin, and 8-9 near margin. Numerous small chloroplasts are present in cells. 形態 殼面平，圓盤形，有一圈環形透明的翼狀延展，硅質壁較薄，且具放射狀肋。細胞 獨立生活，中央圓盤部分直徑30 到180 微米，整個細胞直徑可達360微米。篩室 較大，六邊形，放射狀或者切向排列。殼面中央每10 微米5 到7 個篩室，邊緣8 到9 個，中央到邊緣過渡區域7 到8 個。篩室密度從中央到邊緣區域變大。色素 體小而多。 Ecology and distribution Planktoniella sol is an oceanic planktonic species preferring warm waters. This species is an ideal biological indicator for warm current. 生態與分佈 太陽漂流藻是暖水性外洋浮游物種，是良好的暖流指示種。
RkJQdWJsaXNoZXIy NDk5Njg=