Genus: One emergent flagellum; non-emergent flagellum ends within reservoir; colourless;
osmotrophic; no eyespot; rigid; solitary; elongated; curved; strongly flattened
(Illustrated Guide, 1985).
Species: Cell body banana-shaped, 64-100 μm long, 6-9 μm wide;
bill-like rostrum, ventral line concave, dorsal line convex; a flagellum about a half of the body length
(Angeler, Schagerl & Müller, 2002).
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