130 Pseudosolenia calcar-avis 距端假管藻 Phylum: Heterokontophyta 门：不等鞭毛門 Class: Coscinodiscophyceae 纲：中心硅藻綱 Order: Rhizosoleniales 目：根管藻目 Family: Rhizosoleniaceae 科：根管藻科 Morphology Cells are solitary, elongated, and cylindrical. Valves are asymmetrically conical from girdle view, with the ventral part slightly longer than the dorsal part. A spine-like process is formed at the valve apex and gradually tapers from the base to the slightly curved clawshaped distal part. Frustules are thin and weakly siliceous. Chloroplasts are numerous, small, and granular. 形態 細胞獨立生活，細長圓柱形，從殼環面觀看殼面不對稱的近錐形，背側比腹側稍長。 殼面頂點生成一刺狀突起，從基部到端尖逐漸收窄，末端輕微彎曲，爪狀。細胞壁 薄，硅質化低。色素體小顆粒狀。 Ecology and distribution Pseudosolenia calcar-avis is a cosmopolitan species widely distributed in both coastal and oceanic waters from temperate to tropical areas. 生態與分佈 距端假管藻在溫帶到熱帶的近海及大洋均有分佈。 Size
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