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Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium subcrenatum
Hantzsch var. subcrenatum

Cosmarium subcrenatum 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:

Cosmarium subcrenatum Hantzsch var. subcrenatum ?, outline shape similar to that of C. subspeciosum var. validius Nordstedt, but smaller, cell body 35 μm long, 25 μm wide, L/W=, isthmus 12 μm wide, x 640, Iyari marsh, Omachi city, Nagano Pref., Japan, May 8, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium subcrenatum Cosmarium subcrenatum Cosmarium subcrenatum

Images of collecting locality: Iyari marsh, Omachi city, Nagano Pref., Japan, May 8, 2006 by Y. Tsukii

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