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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium granulatum
W. & G.S. West

Species: Cell body large in size, 117-125 μm long, 85-87 μm wide, isthmus 25-31 μm wide, L/W=1.3; semicells broad oviform, rounded at base; cellwall covered with conical granules, gradually becoming smaller toward the center of the semicells; (Illustrations of The Japanese Fresh-water Algae, 1977).
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Cosmarium granulatum
C. granulatum
130 x 90 μm
Koigakubo marsh
Tessei-cho
Okayama, 2004
Cosmarium granulatum
C. granulatum
μm
Kareki-numa
Nikko
Tochigi, 2008
Similar species -->> C. heterodentatum (Cristatae);

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Cosmarium granulatum
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