image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium regnellii
Wille var. regnellii

Cosmarium regnellii 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: Cell body small, (14-18)-22 μm long, (11-16.8)-22 μm wide, isthmus (11-16.8)-22 μm wide; (Illustrations of the Japanese fresh-water algae, 1977).

Cosmarium regnellii (or C. abbreviatum ?), cell body 15 μm long, 12 μm wide, isthmus 5 μm wide, x 640, rice field near Hanekura bridge, Muneoka, Shiki city, Saitama Pref., Japan, May 30, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium

Cosmarium regnellii Will var. regnellii: Cell body small, (14-18)-22 μm long, (11-16.8)-22 μm wide, isthmus (11-16.8)-22 μm wide; (Illustrations of the Japanese fresh-water algae, 1977).

Please click on images for viewing enlarged.
Copyright Protist Information Server