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:
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S. costatus cell 16 x 7 μm near Imori pond Myoko highland Niigata, 2004 |
S. costatus cell 22 x 7 μm Omotsubo marsh Tetta-cho Okayama, 2004 |
S. costatus ? cell 17 x 7 μm Karakemi marsh Omachi Nagano, 2006  |
S. costatus ? or Scotiella ? Chigo-ike m. Shiga highland Nagano, 2008 |
