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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium dorsitruncatum
(Nordstedt) G.S. West

Cosmarium dorsitruncatum 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 dorsitruncatum (Nordstedt) G.S. West (?), cell body μm long, μm wide, L/W=, isthmus μm wide, x 640, a pond near the entrance of climbing route to Omine mountain, Minakami town, Gunma Pref., Japan, October 21, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium dorsitruncatum Cosmarium dorsitruncatum

Images of collecting locality: a pond near the entrance of climbing route to Omine mountain, Minakami town, Gunma Pref., Japan, October 21, 2007 by Y. Tsukii


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