Genus: Unicellular; variable in shape; a constriction at the center of the cell body;
mostly longer than wide; flattened; each semicell hemispherical, spherical, ellipsoidal,
rectangular, pyramidal or kidney-shaped; no apical indentation
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Cell body (64-82)-79 μm long, 53-64.5 μm wide, L/W=1.20-1.25, isthmus 19-(19.6-25.8) μm wide; semicells covered with radially-arranged granules; frontal view half-circular, lateral view ovoid-circular, apical view ellipsoidal (Illustrations of the Japanese Fresh-water Algae, 1977). |
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
