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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium decoratum
W. et G.S. West var. decoratum

Species: Cell body medium in size or larger, 65-86 μm long, 51-63 μm wide, L/W=1.25, isthmus 19-32.5 μm wide; semicells pyramidal or trapezoid in shape with flattened apex; cellwall covered with large granules (including apex, c.f. C. pseudomagnificum); many triangular pores present at the center of the semicells (Illustrations of The Japanese Fresh-water Algae, 1977).
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Cosmarium decoratum
C. decoratum
70 x 50 μm
Omine numa
Tsukiyono
Gunma, 2003
Cosmarium
C. decoratum
71 x 61 μm
Kodanuki marsh
Fujinomiya
Shizuoka, 2006
Cosmarium decoratum
C. decoratum
64 x 50 μm
Omine numa
Tsukiyono
Gunma, 2006
Cosmarium decoratum
C. decoratum ?
84 x 60 μm
Kashibaru marsh
Karatsu
Saga, 2006
Cosmarium ochthodes
C. decoratum ?
μm
Omine numa 4
Tsukiyono
Gunma, 2007.10
Cosmarium decoratum
C. decoratum or
C. pseudomag. ?
83 x 66 μm
near Omine numa
Tsukiyono
Gunma, 2007
Cosmarium
C. decoratum or
C. pseudomag. ?
76 x 55 μm
Oze marsh
Katashina
Gunma, 2006
Cosmarium decoratum
C. decoratum or
C. pseudomag. ?
μm
Numappara marsh
Kuroiso
Tochigi, 2003
Cosmarium
C. decoratum ?
μm
Shibayachi m.1
Odate
Akita, 2007
Similar species -- >> C. pseudomagnificum;

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Cosmarium decoratum
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