Genus: Colonies spherical, with inner empty space; cells attached to each other by a protrusion of
cell wall, arranged in a single layer; cell body mostly spherical with some conical or grobular
bulges; chloroplasts cup-shaped with a pyrenoid; reproduction by asexual coenobium
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Spherical colonies of 8, 16 or more cells within a gelatinous coat;
cell body spherical 9-10 (-24) μm in diam.,
with 4-10 (-14) small truncate, wart-like processes;
cells connected to adjacent ones by the basal stout processes
(Photomicrographs of the Freshwater Algae, vol. 5, 1986).
|