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Ulvophyceae: Ulotrichales: Ulotrichaceae

 Geminella ellipsoidea
(Prescott) Smith

Geminella 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: Filament covered with a thick gelatinous coat; 2 or 4 cells closely contacted; cell body elongated ellipsoid or ovoid, 4-6 μm long, 7-9 μm wide; chloroplasts parietal, with a single pyrenoid (Photomicrographs of the Freshwater Algae, vol.4, 1985).

Geminella ellipsoidea (Prescott) Smith var. ellipsoidea, cell body 9 μm long, 10 μm wide, L/W=0.9, x 640, Yukawa-numa (pond), Nishiwaga-machi (town), Iwate Pref., Japan, July 28, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Geminella Geminella
Cell body 6-12 μm long, 11 μm wide, L/W=0.5-1.1, gelatinous coat 4 μm in thickness, x 400, x 640
Geminella Geminella Geminella Geminella

Images of collecting locality: Yukawa-numa (pond), Nishiwaga-machi (town), Iwate Pref., Japan, July 28, 2007 by Y. Tsukii

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