48 Nitzschia ventricosa 膨脹菱形藻 Phylum: Heterokontophyta 门：不等鞭毛门 Class: Bacillariophyceae 纲：羽紋硅藻纲 Order: Bacillariales 目：硅藻目 Family: Bacillariaceae 科：硅藻科 Morphology Cells are solitary, long, and straight. Valves are lanceolate. The middle part of the valves expands into a navicular shape, and then sharply contracts into a slender stick shape. Central nodules are small. Chloroplasts are numerous, irregularly shaped, and scattered throughout cell. 形態 細胞單獨生活，長且直。殼面披針形，中部膨大呈舟形，隨後驟然收縮成細長棍狀。 中節較小。色素體較多，形狀不規則，散落在細胞內。 Ecology and distribution Nitzschia ventricosa is a benthic species which could also be epiphytic. 生態與分佈 膨脹菱形藻是底棲物種，也可附著生活。 粒徑 長（縱軸）：171到188微米 （Al-Yamani et al., 2011; 2019）；140 到438微米（高 亞輝等，2021）
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