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Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium ornatum
Ralfs

Cosmarium ornatum Species: Cell body deeply constricted, 32-40 μm long, 35-41 μm wide, constriction (isthmus) 11-13 μm wide, semicells reniform, apex slightly elevated and truncate, lateral margins convex and convergent upward, apex, lateral margins and the center of the semicells furnished with granules, other parts of cell walls smooth (Photomicrographs of the Freshwater Algae, vol. 3, 1985).

Cosmarium ornatum Ralfs, cell body 37 μm long, 37 μm wide, L/W=1.0, isthmus 15 μm wide, x 640, Kannon-numa Forest Park (pond), Shimogo town, Fukushima Pref., Japan, September 10, 2005, collected by Eizaburo Tsukii, photo by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium ornatum Cosmarium ornatum Cosmarium ornatum Cosmarium ornatum Cosmarium ornatum
Cell body μm long, μm wide, L/W=, isthmus μm wide, x 640
Cosmarium ornatum Cosmarium ornatum

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Copyright 1999 Yuuji Tsukii