Order & Family: Floating unicells or a colony within a matrix;
no differentiation of apical and base structures; only one family.
Genus: A colony of spherical cells; each cell is not covered with a sheath,
instead cells are scattered within a gelatinous matrix; the distance between cells is
usually shorter than their diameter
(Illustrations of The Japanese Fresh-water Algae, 1977).
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
