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:
C. meneghinii
v. meneghinii
24 x 18 μm
Uba-ga-daira
Nasu
Tochigi, 2006
C. meneghinii
v. reinschii
18 x 14 μm
Shimo-no-koike
Shiga highland
Nagano, 2004
C. meneghinii
v. reinschii
20 x 17 μm
Univ. A.V.M.
Obihiro
Hokkaido, 2005
C. meneghinii
v. reinschii
18 x 15 μm
Omine-numa 6
Minakami
Gunma, 2007