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Ulvophyceae: Ulotrichales: Ulotrichaceae

Geminella mutabilis
(Brébisson) Wille

Species: Colonies linear filaments consisting of 10-20 cells; cell body short cylindroid, both ends rounded, 15-20 μm long, 8-10 μm in diam.; cells separated each other; a single chloroplast plate-like, with a pyrenoid (Illustrations of the Japanease Freshwater Algae, 1977).
The thickness of the gelatinous sheath variable; planktonic; cell body ellipsoidal or cylindrical with rounded ends, 25-35 μm long, 9-20 μm in diam.; cells scarcely adherent to each other or equally separated on another; chloroplasts a single, plate-like forming a girdle, with a pyrenoid (Photomicrographs of the Fresh-water Algae, vol. 3 (1985).
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Cell body more than 10 μm in diam.
Geminella mutabilis
G. mutabilis
20-34 x 15 μm
Tashirodaira m.
Hakkoda mountain
Aomori, 2005
Geminella mutabilis
G. mutabilis
18-34 x 16.5 μm
Tashirodaira m.
Hakkoda mountain
Aomori, 2006
Geminella mutabilis
G. mutabilis
25-32 x 15.5 μm
near Iroha-numa
Zao mountain
Yamagata, 2006
Geminella mutabilis
G. mutabilis
18-23 x 18 μm
Numappara marsh
Kuroiso
Tochigi, 2003
Geminella mutabilis
G. mutabilis
22-28 x 18-20 μm
Numappara marsh
Kuroiso
Tochigi, 2003
Geminella mutabilis
G. mutabilis
μm
Numappara marsh
Nasu-shiobara
Tochigi, 2007
Geminella mutabilis
G. mutabilis
μm
Ohnuma
Nasu-shiobara
Tochigi, 2008
Cell body less than 10 μm in diam.
Geminella
G. mutabilis
5-12 x 7 μm
Koshigaya
Saitama, 2001
Geminella
G. mutabilis
stock Skg-1
4-10 x 7 μm
Koshigaya
Saitama, 2001
Geminella
G. mutabilis
stock Skg-1
7-14 x 8.5 μm
Koshigaya
Saitama, 2001
Geminella
G. mutabilis
stock Skg-1
5-20 x 8 μm
Koshigaya
Saitama, 2001
Geminella
G. mutabilis
7-12 x 7 μm
Furuyakami
Kawagoe
Saitama, 2004
Geminella
G. mutabilis ?
6-9 x 7-8 μm
Musashi-Urawa
Saitama, 2002
Geminella
G. mutabilis ?
stock Cak-2
7-16 x 7-8 μm
Akebono-yama A.P.
Kashiwa
Chiba, 2002
Geminella
G. mutabilis ?
μm
Uruguay, 1999
Similar genera -->> Microspora; Klebsormidium;

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Geminella mutabilis
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