Genus: Filamentous algae without branching, no rhizoids, covered with gelatinous sheath; cell body cylindrical or ellipsoidal, cells attached side by side or separated; a single chloroplast band-form, with a pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species: Colonies a short lnear filament covered with a gelatinous sheath; cell body short cylindroid, 8-18 μm long, 4-8 μm wide; adjacent cells attached with each other
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Similar genera -->> Microspora; Klebsormidium;
G. minor ?
6-13 x 6.5 μm
Tsuchiura
Ibaraki, 2002
G. minor ?
x 7-8 μm
Matsubushi
Saitama, 2003
G. minor
6 x 5 μm
Japan, 2000