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Gamophyceae: Zygnematales: Zygnemataceae

Spirogyra
Link 1820

Family: Filamentous algae without branching; cell body cylindrical; chloroplasts band-, plate- or star-shaped (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Filament without branching; cell body cylindrical; one or several chloroplasts band-shaped, spirally arranged within the cell, pyrenoids present; septum with or without folded structure (Guide book to the "Photomicrographs of the Freshwater Algae", 1998). About 300 species (Illustrations of The Japanese Fresh-water Algae, 1977).
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More than 100 μm diam. (17 samples)
Spirogyra margaritata
S. margaritata
x μm
chl.
Toneri Park
Tokyo, 2001
Spirogyra
S. margaritata
x 144-148 μm
14 chl.
Kurihashi
Saitama, 2001
Spirogyra
S. setiformis
3 chl. 3.5 turns
x 108 μm
Saitama, 2001
Spirogyra
S. setiformis
3 chl. 3.5 turns
x 108 μm
Saitama, 2001
50-100 μm diam. (40 samples)
Spirogyra
S. ternata
3 chl. 1.5-3 turns
radiate nuc.
69-88 μm diam.
1997-99
Spirogyra
S. majuscula
6 chl. 1.5 turns
gelatinous sheath
75 μm diam.
Saitama, 2000
Spirogyra
S. sp.02
4 chl. 2 turns
x 58 μm
Chiba, 2000
Spirogyra
S. distenta
2 chl. 2-2.5 turns
spherical nuc.
112 x 53 μm
1998-2001
25-50 μm diam. (93 samples)
Spirogyra
S. sp.13
4 or 6 chl.
disc-like nuc.
475 x 48 μm
1998
Spirogyra
S. porticalis
1 chl.
spherical nuc.
36-40 μm diam.
1997-99
Spirogyra
S. sp.20
3 chl.
conjugation
35 μm diam.
1998-2001
Spirogyra
S. varians
1 chloplast
disc-like nuc.
35 μm diam.
2000-2006
Less than 25 μm diam. (40 samples)
Spirogyra
S. sp.17
1 chl.
spherical ? nuc.
24-26 μm diam.
1998-2000
Spirogyra
S. sp.7
4 chl. 3-4 turns
ovoid nuc.
25 μm
1998-99
Spirogyra
S. sp.1
1 chl. 5 turns
125 x 16 μm
Tochigi, 2001
Spirogyra
S. sp.
1 chl. turns
x 12 μm
Showa Memorial p.
Tokyo, 2001
Septum folded: (27 samples)
Spirogyra
Spirogyra sp.
1 chl. 6.5 turns
x 28 μm
Saitama, 2001
Spirogyra
S. arta ?
6 samples
1 chl. 8 turns
spherical nuc.
x 19-20 μm
1998-2006
Spirogyra
S. tenuissima
6 samples
1 chl. 4-9 turns
x 14-15 μm
1998-2006
Spirogyra
Spirogyra sp.
1 chl. turns
x 12 μm
Shikinawa-ike
Fukuoka, 2001
???
Spirogyra
Spirogyra sp.
or Mougeotia ?
Japan, 1998
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Spirogyra
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