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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium scopulorum
Borge

Cosmarium scopulorum Genus: Unicellular; variable in shape; a constriction at the center of the cell body; mostly longer than wide; flattened; each semicell hemispherical, spherical, ellipsoidal, rectangular, pyramidal or kidney-shaped; no apical indentation (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Cell body octagonal in shape, 23-24 μm long, 17-18 μm wide, isthmus 5.6 μm wide, L/W=1.4; semicells nearly hexagonal; cell wall smooth; apical view elliptical (Illustrations of The Japanese Fresh-water Algae, 1977).


Cosmarium scopulorum, cell body 28 μm long, 19 μm wide, isthmus 7 μm wide, L/W=1.5, x 640, a small pond near Shide-numa (pond), near Watarase-yusuichi (Watarase wetland), Kita-kawabe town, Saitama Pref., April 10, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium scopulorum


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