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 rectangular, 53-90 μm long, 47.6-85 μm wide; isthmus 19-30 μm wide;
semicells subrectangular, with rounded corners; side view nearly circular; apical view elongated ellipsoidal;
marginal granules 34-37 in number
(Illustrations of the Japanese fresh-water algae, 1977).
|