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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium logiense
f. expansa W. et G.S. West

Cosmarium logiense Species[ var. logiense]: Cell body slightly longer than width, 59-65 μm long, 48-53 μm wide, isthmus 16-22.4 μm wide; semicells reniform, basal corners rounded, with 2 pyrenoids. [f. expansa]: Cell body slightly longer than width, 64.4-67 μm long, 50.4-53 μm wide, isthmus 16.8-18 μm wide; semicells reniform, basal corners rounded, apex broader than that of var. logiense; cell wall covered with many granules (Illustrations of The Japanese Fresh-water Algae, 1977).


Cosmarium logiense f. expansa W. et G.S. West ?, cell body about 70 μm long, 60 μm wide, isthmus 22 μm wide, x 400, x 640, Uruguay, November 1999, photo by Yuuji Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium Cosmarium


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