|  Species: 40-65 μm long, 14-20 μm wide; anterior end rounded, posterior end pointed; 
fusiform during locomotion; highly plastic when stationary; chloroplasts more or less bandform, 
radially arranged; nucleus posterior (Kudo, 1966).  
Fusiform, 40-80 μm long, 12-20 μm wide; swim rapidly (Illustrated guide, 1985). Mucous body granular in shape (An illustrated guide to freshwater zooplankton in Japan, 2000).
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