Species: 50-175 μm long,
8-18 μm wide;
body long spindle or cylindre, with a sharply pointed posterior end;
numerous discoid chloroplasts; several paramylon (paramylum) bodies; nucleus central; stigma distinct;
flagellum short, about one-fourth the body length (Kudo, 1966).
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Euglena acus,
cell body about 150 μm long, 10 μm wide,
stigma distinct, sharply pointed posterior end, numerous discoid chloroplasts,
chloroplasts small disc-shaped, μm in diam.,
paramylon bodies rod-shaped, 11-12 μm long, flagellum short,
x 400, x 640, Japan, 199? by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640