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:

S. habeebense Conjugation 38 x 38 μm Fukasaku Saitama, 2002	S. habeebense 40 x30 μm Ushijima park Kasukabe Saitama, 2003	S. habeebense 43 x 30 μm Tama river Chofu Tokyo, 2004	S. habeebense 40 x 27 μm Kuritsubo Hidaka Saitama, 2004
S. habeebense 41 x 29 μm Kinchakuda Hidaka Saitama, 2004	S. habeebense 40-45 x 28-32 μm near Kurome River Asaka Saitama, 2006	S. habeebense μm near Kurome River Asaka Saitama, 2008

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