Genus: Colonies of 4 (or 2, 8, 16) cells attached side by side, arranged linearly or zigzag; cell body elliptical or spindle or crescent in shape; terminal cells with spiny projections in many species; cell wall usually smooth, but in some species granulated or dented or ridged (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: (Illustrations of The Japanese Fresh-water Algae, 1977).
S. microspina ?
cell μm
spines μm
Kodama town
Saitama, 2003
S. microspina ?
cell μm
spines μm
Hyogo-ike
Setagaya
Tokyo, 2004
S. microspina ?
cell μm
spines μm
Iruma river
Kawagoe
Saitama, 2004
