Genus: Cell body crescent in shape (long, curved, tapered at both ends); cross section rounded;
cell wall smooth or with longitudinal lines, bands on the cell wall in some species;
chloroplast laminae ridged and radially arranged, which makes cross section star-shaped;
pyrenoids aligned or scattered (Illustrations of The Japanese Fresh-water Algae, 1977).
Subgenus [Euclosterium]: Cell body curved. Species: Cell body moderate in size, elongate, 270-512 μm long, 13-22 μm wide ( L/W= 18-30); slightly curved at both ends, spindle-shaped at middle; both termini slighlty rounded; cell wall transparent or brownish with thin lines (8-11 lines/10 μm wide); chloroplasts composed of 5 lamellae; 4-6 pyrenoids in each half-cell (Photomicrographs of the Fresh-water Algae, vol. 4, 1985). |
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
