|  Genus: Spindle, cylindrical or band-form; pellicle usually marked by longitudinal or spiral striae; 
some with a thin pellicle highly plastic; stigma usually anterior; chloroplasts discoid, 
band-form, or fusiform; two paramylum bodies located on 
either side of nucleus, rod-like to ovoid in shape or numerous and scattered throughout; contractile vacuole 
near reservoir; cell division longitudinal (Kudo, 1966). Species: Cell body spindle-shaped with short tail, slightly plastic; flagellum short; 
88-95 μm long, 
20-25 μm wide; 
pellicle spirally striated; chloroplasts band-shaped, numerous, arranged along with the striae;  
paramylon bodies rod shaped, many; 
(Illustrations of The Japanese Fresh-water Algae, 1977).
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