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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium portianum
W. Archer var. portianum

Cosmarium portianum Section [ Ornatae ]: Semicells circular, ellipsoid, reniform; cell surface granulated or spiny (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:


Cosmarium portianum W. Archer var. portianum, cell body 44 μm long, 30 μm wide, L/W=1.5, isthmus 12 μm wide, x 640, No.6, Omine-numa (pond/marsh), Omine, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, April 15, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium portianum Cosmarium portianum
Cell body 44 μm long, 28 μm wide, L/W=1.6, isthmus 12 μm wide, x 640
Cosmarium portianum Cosmarium portianum

Images of collecting locality: No.6, Omine-numa (pond/marsh), Omine, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, April 15, 2007 by Y. Tsukii


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