Species: Trichome straght or wavy, not constricted at cell-cell junctions, 4-8 μm long, 3.5-4 (or 6) μm wide; granules absent along septum (Illustrations of The Japanese Fresh-water Algae, 1977).
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O. chlorina ?
x 3.5-4 μm
L/W=
Imou bog
Toyohashi
Aichi, 2004
O. chlorina ?
x 3.5 μm diam.
L/W=
Omotsubo marsh
Tetta-cho
Okayama, 2004
O. chlorina ?
x 3 μm
L/W=
Shide-numa
Kita-kawabe
Saitama, 2005
