Gamophyceae:
Zygnematales: Desmidiaceae
Cosmarium angulosum
Brébisson
Species [ var. angulosum ]: Cell body small, 14-31 μm long, 12.6-21 μm wide,
L/W=1.5, isthmus 3.4-6 μm wide; semicells quadrate or hexagonal in shape.
[ var. concinnum ]: Smaller than var. angulosum, (11-12)-13 μm long, 8-12
μm wide, L/W=1.3, isthmus 2.6-4.5 μm wide
(Illustrations of the Fresh-water Algae, 1977).
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Cosmarium angulosum Brébisson ?,
cell body 26 μm long, 14 μm wide, constriction 8 μm wide,
x 400, x 640, Tsukuba city, Ibaraki Pref., Japan, October 2000, collected by N. Kinoshita, photo by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Cosmarium angulosum Brébisson:
Cell body small, 14-31 μm long, 12.6-21 μm wide, isthmus 3.4-6 μm wide,
L/W=1.5;
(Illustrations of the Fresh-water Algae, 1977).
Cosmarium braunii Reinsch:
Cell body small, 42 μm long, 34 μm wide, isthmus 11 μm wide,
L/W=1.25;
(Illustrations of the Fresh-water Algae, 1977).
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