Genus:
Only 1 flagellum emergent from canal, colourless; eyespot present;
cell body semi-rigid, but can bend and loop; elongated, tapering;
paramylon grains needle-like;
several species, freshwater (Illustrated Guide, 1985).
Species: Long, thin, 120-210 μm long,
5-15 μm wide;
cell glides when not swimming; eyespot pale orange;
long paramylon needles (25-30 μm)
(Illustrated Guide, 1985).
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