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).