Species [ var. cucurbitinum ]: Cell body medium in size, (56.5-73)-83 μm long,
26-(28-30)-33 μm wide, L/W=2.5, slightly constricted at the center;
semicells semi-spindle shaped, gradually attenuated toward apex, lateral margins convex, apex broad circular;
cell wall dotted. [ f. minor ]: Smaller than var. cucurbitinum, 50-(56-60) μm long, 22.5-25-(26.5-28) μm wide (Illustrations of The Japanese Fresh-water Algae, 1977). |
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
