image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium caelatum
Ralfs var. spectabile (De Notaris) Nordstedt

Cosmarium caelatum 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).
Similar species -->> C. tetraophthalmum;

Cosmarium caelatum Ralfs var. spectabile (De Notaris) Nordstedt, cell body 48 μm long, 40 μm wide, L/W=1.2, isthmus 18 μm wide, x 640, Shimizu-daira, Nasu town, Tochigi Pref., Japan, September 10, 2005, collected by Eizaburo Tsukii, photo by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium caelatum Cosmarium caelatum Cosmarium caelatum

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