image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium sp.

Cosmarium 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.
Subgenus [ Eucosmarium ]: Cell body dorso-ventrally compressed, with strong constriction at the center, transverse section elliptical or diamond-shaped.
Section [ Globuliferae ]: Cell surface smooth; semicells circular, ellipsoidal, reniform (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:

Cosmarium sp., stock Sfak-1, axenic culture with KCM & Hyponex (from January 15, 2005 to Feburary 16, 2005), cell body 46 μm long, 38 μm wide, L/W=1.2, isthmus 24 μm wide, 2-3 (or 4?) pyrenoids in each semicell, x 640, rice field, Myoyo (Myouyou), Fukiage town, Saitama Pref., Japan, October 17, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx
xxxx xxxx xxxx xxxx

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