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: Filament 10-12-(-15) μm wide (Süßwasserflora von Mitteleuropa 3, Xanthophyceae 1, 1978). Filament 8-12 μm wide; many chloroplasts in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

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Cell body 6-12 μm wide
T. viride 12 μm φ Senjo-ga-hara Nikko Tochigi, 2003	T. viride 12 μm Yanase river Tokorozawa Saitama, 2004	T. viride 8-9 μm chl. disc-shaped Saitama, 1999	T. viride 26 x 10 μm Shiba river near Owada p. Saitama, 2005
T. viride 8-10 μm φ Kiyasse-Hanyu Hanyu Saitama, 2006	T. viride 10-13 μm φ Oyoshi Park Koshigaya Saitama, 2006	T. viride 10 μm φ agricultural drain Fujimi Saitama, 2006	T. viride 12 μm φ Ukima Park Kita/Itabashi Tokyo, 2006
T. viride 13 μm φ Daini-koen Tochigi city Tochigi, 2007	T. viride 14 μm φ Uzuma-koen Tochigi city Tochigi, 2007	T. regulare ? or T. viride ? 8-9 μm φ Kanayama g.p. Kiyose Tokyo, 2001	T. viride 12 μm φ Kanayama c. Kiyose Tokyo, 2007
T. viride x 11 μm φ Kanayama c. Kiyose Tokyo, 2008

Similar species -->> T. vulgare

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