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 [Microcosmarium]: Cell surface smooth or dotted or punctated; semicells polygonal (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Cell body octagonal in shape, 23-24 μm long, 17-18 μm wide, isthmus 5.6 μm wide, L/W=1.4; semicells nearly hexagonal; cell wall smooth; apical view elliptical (Illustrations of The Japanese Fresh-water Algae, 1977).

Google Image Search

C. scopulorum 29 x 19 μm L/W=1.6 Univ. A.V.M. Obihiro Hokkaido, 2005	C. scopulorum 28 x 19 μm L/W=1.5 near Shide-numa Kita-kawabe Saitama, 2005	C. scopulorum 27 x 17 μm L/W=1.6 Kawagoe Saitama, 2001	C. scopulorum 24 x 16 μm L/W=1.5 Saitama, 1999
C. scopulorum 24 x 16 μm L/W=1.5 Kaga Ishikawa, 2000	C. scopulorum 23 x 15 μm L/W=1.5 Kuroiso Tochigi, 2001	C. scopulorum 21 x 14 μm L/W=1.5 Kurihashi Saitama, 2001	C. scopulorum 26 x 20 μm L/W=1.3 Saitama, 1999

Similar species -- >> C. laeve; C. granatum;

Please click on species name for more images.

Copyright Protist Information Server