Genus: Cell body short, radiate in shape; apical view of the cell, triangular, polygonal, ellipsoidal or spindle-shaped; zygospores formed outside of mother cells (Illustrations of The Japanese Fresh-water Algae, 1977)
Subgenus: lacks arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)
Species:
Google Image Search
v. nanum
30 x 37 μm
Univ. A.V.M.
Obihiro
Hokkaido, 2005
S. asteroideum ?
4 projections
x 36 μm
Imou bog
Toyohashi
Aichi, 2004
S. asteroideum ?
23 x 23 μm
Mida-ga-hara
Gassan
Yamagata, 2005
