|  Species: 
70-170 μm long, 
25-36 μm wide; 
cell body cylindrical; anterior rounded and posterior tapered; spiral striation; 
nucleus posterior; flagellum longer than body; stigma about 7 μm 
in diam., many fusiform chloroplasts aligned with the striae; 
numerous haematochrome granules; paramylum bodies ovoid (Kudo, 1966). |