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Ulvophyceae: Ulotrichales: Ulotrichaceae
(Chlorophyceae: Ulotrichales: Ulotrichaceae)

Ulothrix
Kützing 1833 (John et al., The Freshwater Algal Flora of the British Isles, 2002)

Order: Uninucleate filamentous algae without branching; cell body mostly cylindrical; all cells can divide; chloroplasts parietal with one or more pyrenoids; asexual reproduction by fragmentation of algae or formation of zoospores with two or four flagella; usually eyespot present; sexual reproduction by isogamy, anisogamy or oogamy
Family: Chloroplasts plate-like or ribbon-like; sexual reproduction by isogamy.

Genus: Without gelatinous sheath; filaments consist of many cells; rhizoid formed at one end (Illustrations of The Japanese Fresh-water Algae, 1977).
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Cell body more than 20 μm in diam.
Ulothrix
Ulothrix sp.
x 27-47 μm
Matsumoto
Nagano, 2001
Ulothrix
Ulothrix sp.
x 23 μm
Iruma
Saitama, 2001
Ulothrix
U. zonata
x 57-65 μm
riverside park
Kuroiso
Tochigi, 2005
Ulothrix zonata
U. zonata
30 x 45 μm
Azami-numa
Iwajuku
Gunma, 2006
Ulothrix
U. zonata
x 20-43 μm
Ujiie (Sakura)
Tochigi, 2001
Ulothrix
U. zonata
x 32 μm
Moroyama
Saitama, 2003
Ulothrix zonata
U. zonata
12-20 x 35 μm
Akagi forest p.
Fujimi
Gunma, 2005
Ulothrix
U. tenuissima ?
11 x 35 μm
Yamagata, 1999
Ulothrix
Ulothrix sp.
x 25-32 μm
Tama river
Komae
Tokyo, 2004
Ulothrix
Ulothrix sp.
x 29 μm
Iruma river
Sayama
Saitama, 2004
Ulothrix
Ulothrix sp.
x 23-28 μm
Kinu-gawa g.p.
Takanezawa
Tochigi, 2004
Ulothrix
Ulothrix sp. ?
5-18 x 35-40 μm
Usui river
Takasaki
Gunma, 2004
Ulothrix zonata
Ulothrix sp.
x 28 μm
Isa-numa
Kawagoe
Saitama, 2008
Cell body 10-20 μm in diam.
Ulothrix
Ulothrix sp.
or Geminella ?
or Microspora ?
x 20 μm
Nishi-Urawa
Saitama, 2001
Ulothrix
Ulothrix sp.
x 15-17 μm
Kido-ike
Shiga highland
Nagano, 2006
Ulothrix
Ulothrix sp.
x 13-14 μm
Kiyose
Tokyo, 2001
Ulothrix
Ulothrix sp.
7-10 x 13 μm
Nanbata-shinden
Fujimi
Saitama, 2004
Ulothrix
Ulothrix sp.
x 13-16 μm
Iruma river
Sayama
Saitama, 2004
Ulothrix
Ulothrix sp.
x 14-17 μm
Kuroiso
Tochigi, 2001
Ulothrix
Ulothrix sp.
or Klebsormidium ?
6-17 x 18 μm
Japan, 1998
Ulothrix
Ulothrix sp.
12-15 x 14 μm
Usui river
Takasaki
Gunma, 2004
Ulothrix
Ulothrix sp.
or Klebsormidium ?
7-15 x 16 μm
Japan, 1998
Ulothrix
Ulothrix sp.
x 8-12 μm
Kuroiso
Tochigi, 2001
Ulothrix
Ulothrix sp.
or Klebsormidium ?
7-13 x 9-10 μm
Oyomi marsh
Japan, 1998
Cell body less than 10 μm in diam.
Ulothrix
Ulothrix sp. ?
18-25 x 7-9 μm
Ara-kawa
Kumagaya
Saitama, 2004
Ulothrix
Ulothrix sp.
5-11 x 7 μm
Japan, 1997
xxxx
Ulothrix sp.
μm
Mizuko
Fujimi
Saitama, 2003
Ulothrix
Ulothrix sp.
or Klebsormidium ?
16-17 x 9 μm
Kurome river
Asaka
Saitama, 2004
Ulothrix
Ulothrix sp.
or Klebsormidium ?
x 9 μm
Numa-no-hara m.
Madarao highland
Niigata, 2005
Ulothrix
Ulothrix sp.5
or Klebsormidium ?
3-6 x 5 μm
Japan, 1998

Ulothrix sp.5
or Klebsormidium ?
x 4.6 μm
Japan, 1998
xxxx
Ulothrix sp.5
x μm
Mizuko
Fujimi
Saitama, 2003

Ulothrix sp.5 ?
or Klebsormidium ?
cell μm
Japan, 1998
???
Ulothrix
Ulothrix sp. ?
9-11 μm φ
pyrenoids present
Kiyose
Tokyo, 2001
Ulothrix
Ulothrix sp. ?
5-10 x 7 μm
pyrenoids present
Sanda
Hyogo, 2001
xxxx
Ulothrix sp. ?
9-18 x 6 μm
pyrenoids present
Sayama Natural p.
Saitama, 2001
Ulothrix
Ulothrix sp. ?
10-18 x 5.5 μm
pyrenoids present
Sanda
Hyogo, 2001
Similar Genus ->> Klebsormidium; Geminella;

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Ulothrix
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