Genus: Colony within a gelatinous bag; cells uniformly arranged at the peripheral matrix;
cell body spherical or ellipsoidal with 2 pseudo-flagella; 2-4 cells form a small subset;
a single chloroplast cup-shaped, with a pyrenoid
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Small colonies planktonic or large ones attached to other substrates
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species: getatinous sheath cell body spherical, 6-12 μm in diam., planktonic |
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
