Euglenaria

裸藻門Euglenophyta

裸藻綱Euglenophyceae

裸藻目 Euglenida

裸藻科 Euglenidae

眼裸藻屬Euglenaria

描述：The cells are small (24–38μm × 9–18μm), unusually motile, wide and spindle-shaped, yet narrowed in the middle; in broad terms each cell resembles an hourglass and it is slightly asymmetrical. The anterior is rounded and a bit smaller than the posterior, which tapers off abruptly into a sharp, hyaline tailpiece (5–10 μm long). The single emergent flagellum is long (1.5–2 times the body length). There are usually three relatively large chloroplasts per cell, which are parietal and plate-like, with uneven, incised outlines. Each chloroplast contains a pyrenoid, which is accompanied by two paramylon caps. The periplast is striated in a distinct spiral pattern. There are numerous small paramylon grains, which have various shapes (oval, rod-shaped, ring-shaped) and most are concentrated at the front of the cell (Figs 4, 5), where chloroplasts are absent. The single emergent flagellum is long (1.5–2 times the body length). The stigma is relatively large. Mucocysts are absent.