Genus: Cells are equal in size (Illustrations of The Japanese Fresh-water Algae, 1977).
Planktonic; colony within a gelatinous sheath; cell body spherical, elliptical or pear-shaped; 4 daughter cells
attached to a filament dichotomously radiating from the center of the colony;
a single chloroplast cup-shaped, with a pyrenoid.
Species: Cell body reniform in side view, broad-ellipsoid in face view, (6-) 10-20 μm long, (3-) 6-10 μm wide, attached by their convex side to radially, di- or tetrachotomously branced filaments; a single chloroplast cup-shaped, lying at the convex side of the cells, with a pyrenoid (Photomicrographs of the Freshwater Algae, vol. 5, 1986). |
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
