Genus:
Species:
Cells 31-39 μm long,
9-13 μm broad;
strongly metabolic; fusiform or most frequently asymmetrically
gourd-shaped, anterior end broadly rounded, undulated at middle portion of the cells and attenuated
into a short blunt non-hyaline cauda; pellicle delicately spirally striated, 20-24 striae per 10
μm;
chloroplast numerous, disk-shaped, parietal, 2~3m in diameter, without pyrenoids; paramylon
grains dimorphic: one bigger rod-shaped (4-5 ~ 2-3 μm),
located near the eyespot, numerous
small granulate ones scatter in the cytoplasm; nucleus spherical,
5-7 μm in diameter, enclosed
by some small paramylon grains, located dorsally at posterior portions of the cells; eyespot
very prominent, curved lamellar-shaped, with convex face outward,
4-5 μm in length;
locomotory flagellum body length.
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