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Cyanophyceae: Nostocales: Oscillatoriaceae

Oscillatoria irrigua
Kützing

Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Trichome dark-blue in color, nearly straight, without constriction at cell-cell junction, 6-11 μm wide; cell body reddish blue in color, 4-11 μm long (1/4-1/2 of its width); granules present along septum (cf. granules absent -> O. simplissima); cell wall of the terminal cells thick (Illustrations of The Japanese Fresh-water Algae, 1977).
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Oscillatoria irrigua
O. irrigua ?
or O. curviceps ?
11 μm φ
L/W=
Ta river
Ishibashi
Tochigi, 2004
Oscillatoria irrigua
O. irrigua ?
9 μm φ
L/W=
Omoi river
Oyama
Tochigi, 2004
Oscillatoria
O. irrigua ?
3.5-4.5 x 9 μm φ
L/W=0.4-0.5
near Yamaguchi Univ.
Yamaguchi, 2004
Oscillatoria
O. irrigua ?
9 μm φ
L/W=
Mizuko
Fujimi
Saitama, 2003
Oscillatoria
O. irrigua ?
8.5 μm φ
L/W=0.6-1.2
Akagi forest p.
Fujimi
Gunma, 2005
Oscillatoria
O. irrigua ? (left)
8 μm φ
L/W=0.4-0.8
Tanohara Natural p.
Ontake highland
Nagano, 2005
Oscillatoria
O. irrigua ? (left)
4-8 μm φ
L/W=
Imou marsh
Toyohashi
Aichi, 2006
Oscillatoria
O. irrigua
9 μm φ
L/W=
Kashibaru marsh
Karatsu
Saga, 2006
Oscillatoria
O. irrigua ?
6 μm φ
L/W=
Kurome river
Asaka
Saitama, 2004
Oscillatoria
O. irrigua ?
2-3 x 7 μm
L/W=0.3-0.4
Akigase Park
Saitama, 2002
Oscillatoria
O. irrigua ?
7.5 μm φ
L/W=
Nasuno-ga-hara m.
Nishi-nasuno
Tochigi, 2004
Oscillatoria
O. irrigua ?
5-7 x 7.5 μm
L/W=0.7-0.9
Shimo-no-koike
Shiga highland
Nagano, 2004
Oscillatoria
O. irrigua ?
3-6 x 5 μm
L/W=0.6-1.2
Kitamoto nature o.p.
Kitamoto
Saitama, 2005
Oscillatoria
O. irrigua ?
or O. simplicissima ?
9.5 μm φ
L/W=
O-ike park
Yabuki
Fukushima, 2003
Oscillatoria
O. irrigua ?
or O. simplicissima ?
9.5 μm φ
L/W=
Furu-tone river
Kasukabe
Saitama, 2004
Oscillatoria
O. irrigua ?
or O. simplicissima ?
8.5 μm φ
L/W=
Motono
Chiba, 2003
Oscillatoria
O. irrigua ?
or O. simplicissima ?
2-4 x 9 μm
L/W=
water treatment c.
Sakado
Saitama, 2004

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Oscillatoria irrigua
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