Species [var. lunula] : Cell body large, 250-(430-552)-1000 μm long, 47-(73-89)-120 μm wide, L/W=5-8; inner-side nearly straight, outer-side convex; tapered at both termini (broad circle, slightly inversed); cell wall smooth, transparent, without bands; chloroplasts with many pyrenoids. [var. biconvexum Schmidle]: Inner-side also convex; 455-603 μm long, 85-126 μm wide, (Illustrations of The Japanese Fresh-water Algae, 1977). QuickTime Movies http://protist.i.hosei.ac.jp/

50 μm 100 μm 150 μm; x 400