Genus: Spindle, cylindrical or band-form; pellicle usually marked by longitudinal or spiral stirae; 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: 80-170 μm long, 25-45 μm wide; posterior bluntly rounded; flagellum about the body length; pellicle striated; chloroplasts elongated, parallel to the striae; haematochrome granules scattered in sun light and gathered in central area in darkness (Kudo, 1966). Body broadly fusiform; 90-120 μm long, 25-35 μm wide; anterior rounded, posterior tapered with a short process; chloroplasts tasselized and forming chromatophore bands, 12-16 in number; flagellum = body length (Photomicrographs of the Freshwater Algae, 1996).