Species:
Cell body lemon-shaped, slightly compressed, anterior tapered with blunt end,
posterior slightly pointed; 25-51 μm long, 12-39 μm wide;
locomotive flagellum 1-1.5 longer than the body;
paramylon bodies ring-shaped curved along the cell periphery, usually two in number;
an opening of the canal located at the anterior end; pellicle spirally striated at left hand
(An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).
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