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Ulvophyceae: Ulotrichales: Ulotrichaceae

Geminella
Turpin 1828 em. Lagerheim 1883

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: Filamentous algae without branching, no rhizoids, covered with gelatinous sheath; cell body cylindrical or ellipsoidal, cells attached side by side or separated; a single chloroplast band-form, with a pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
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Geminella mutabilis
G. mutabilis
11 samples
x 7-20 μm
1999-2008
Geminella
G. mutabilis ?
11 samples
x 7-20 μm
1999-2008
Geminella
G. ellipsoidea
28 samples
x 5-12 μm
2001-2008
Geminella
G. ellipsoidea
27 samples
x 5-12 μm
2001-2008
xxxx
Geminella sp.
G. ellipsoidea ?
x 13 μm
Shimo-kawahara p.
Sayama
Saitama, 2005
xxxx
Geminella ?
6-11 x 8 μm
Iroha-numa
Zao mountain
Yamagata, 2005
Geminella
G. pulchra
11 samples
x 4.5-9 μm
2001-2007
Geminella
G. pulchra
11 samples
x 4.5-9 μm
2001-2007
Geminella
Geminella sp.
x 5 μm
Higashi-sano
Hakuba
Nagano, 2004
Geminella
G. interrupta ?
10-12 x 6 μm
Satsunai river
Obihiro
Hokkaido, 2005
Geminella
G. interrupta ?
x 10 μm
Nishi-Urawa
Saitama, 2001
xxxx
G. interrupta ?
x μm
Iyari marsh 1
Omachi
Nagano, 2007
Geminella
G. minor
3 samples
x -8 μm
2000-2003
Geminella
stock Fkom-1
μm
Komado marsh
Showa & Tajima
Fukushima, 2004
Geminella
Geminella ?
7-11 x 7 μm
Iruma river
Kawagoe
Saitama, 2004
xxxx
Geminella
or Klebsormidium or ?
7-11 x 7 μm
Hachiman-numa
Hachimantai
Iwate, 2005
Similar genera -->> Ulothrix; Microspora; Klebsormidium;

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Geminella
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