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Xanthophyceae: Tribonematales:

Tribonema sp.

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:

Tribonema sp. (T. regulare or T. viride ?), cell body 15-23 μm long, 11-12 μm wide, x 640, rice field, Shimo-muneoka, Shiki city, Saitama Pref., Japan, October 24, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Tribonema regulare Tribonema regulare

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