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Xanthophyceae: Tribonematales:

Tribonema minus
(Wille) Hazen

Tribonema Genus: Filament without branching; cell body cylindrical; each cell wall consists of two parts with "H" structure overlapping at the midregion; chloroplasts many, disc-shaped, without pyrenoids (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species: Filaments with a slight constriction at cell-cell junction; cell body cylindrical, slightly swelled at the center, 10-13 μm long ,4-5 μm wide, L/W=1.5-2-(3); chloroplasts 2 or 3 in number, plate-like (Illustrations of the Japanese Freshwater Algae, 1977). Filaments 4-6 μm wide; cell body up to 2 times longer than its width (Süßwasserflora von Mitteleuropa 3, Xanthophyceae 1, 1978).


Tribonema minus (Wille) Hazen, cell body 14-15 μm long, 4.5 μm wide, 2 plate-form chloroplasts in each cell, x 640, Okubo Ryoke (picnic-no-mori), Akigase park, Saitama city, Saitama Pref., Japan, March 21, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Tribonema minus

Images of collecting locality: Okubo Ryoke (picnic-no-mori), Akigase park, Saitama city, Saitama Pref., Japan, March 21, 2006 by Y. Tsukii


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