|   Species: 
Cell body medium in size, body length about 4/3 longer than its width, 
(67-76)-90-105 μm long, (50-62)-75-90 μm wide, 
constriction (49-56)-79 μm wide; semicell half-circle in shape, apex slightly fattened; 
cell body covered with minute granules but smooth at the constriction zone; 
apical view of the cell body broad ellipsoidal (Illustrations of the Japanese fresh-water algae, 1977).
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