Gamophyceae:
Zygnematales: Desmidiaceae
Cosmarium logiense
Bisset var. 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).
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Cosmarium logiense Bisset var. logiense ?,
cell body 54 μm long, 44 μm wide, isthmus 18 μm wide, L/W=1.2,
x 640, water field near Takao bridge, near Takao-sakura park, Kitamoto city, Saitama Pref., April 17, 2005 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Cosmarium logiense Bisset var. logiense ?,
cell body 45 μm long, 42 μm wide, isthmus 16 μm wide, L/W=1.1,
x 640, water field near Takao bridge, near Takao-sakura park, Kitamoto city, Saitama Pref., April 17, 2005 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Cell body 48 μm long, 42 μm wide, isthmus 17 μm wide, L/W=1.1, x 640
Cell body 50 μm long, 42 μm wide, isthmus 17 μm wide, L/W=1.2, x 640
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