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Raphidophyceae: Raphidomonadales
Raphidomonadida

Gonyostomum
K. Diesing 1866

Family:
Genus (Diesing): Cells obovate or almost spherical, flattened dorsoventrally; rod-shaped trichocysts around cell periphery or concentrated at the 2 ends of the cell; flagella usually same length as cell; but trailing flagellum may reach twice that length; many chloroplasts in a single layer in the cell periphery (Illustrated Guide, 1985). (Illustrations of The Japanese Fresh-water Algae, 1977).
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Gonyostomum
G. depressa
cell 39 x 31 μm
Saitama, 2000
Movies
Gonyostomum
G. depressa ?
cell 31 x 27 μm
Koshigaya
Saitama, 2001
Gonyostomum depressa
G. depressa ?
cell 28 x 25 μm
Tsuchiura
Ibaraki, 2002
Gonyostomum depressa
G. depressa
cell 33 x 31 μm
Sannoh park
Nishi-ku
Saitama, 2004
Gonyostomum depressa
G. depressa
cell μm
near Town Hall
Shobu
Saitama, 2004
Gonyostomum depressa
G. depressa
38 x 36 μm
Noda
Namegawa
Saitama, 2004
Gonyostomum depressa
G. depressa
35 x 30 μm
Hasu-ike
Mizumoto Park
Tokyo, 2006
Gonyostomum semen
G semen ?
or Vacuolaria ?
37 x 29 μm
Kasuga
Fukuoka, 2001
Gonyostomum semen
G semen
or Merotrichia ?
49 x 27 μm
Kannon-numa
Shimogo
Fukushima, 2005
Gonyostomum semen
G semen
or Merotrichia ?
52 x 30 μm
Ochiai-numa
Noshiro
Akita, 2007
Similar genus ->> Vacuolaria;

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Gonyostomum depressa
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