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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium notabile
Brébisson f. arcticum Kossinskaja

Cosmarium notabile Section [Margaritiferae]: Cell surface granulated, gnarled or spiny; semicells pyramidal with flattened apex or trapezoid (Illustrations of The Japanese Fresh-water Algae, 1977).
Species [f. arcticum]: Cell body 35 μm long, 24 μm wide, isthmus 12.6 μm wide, both sides with 6 waves (including basal and apical corners), apex with 2 corners and 2 waves (Illustrations of The Japanese Fresh-water Algae, 1977).

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Cosmarium notabile f. arcticum, cell body 38 μm long, 24 μm wide, constriction 11 μm wide, x400, x 640, Hiroshima Pref., Japan,1998, by Y. 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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