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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Similar species -->> T. vulgare
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