Family: Unicells or cells loosely attached to form hyphae; cell body varied in shape, a constriction at the center in most species; cell walls consisting of two or more parts, with small pores and various ornaments (Illustrations of The Japanese Fresh-water Algae, 1977).
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).
Cosmarium sp.
1 clip
Torinome kasen p.
Kuroiso
Tochigi, 1998
C. binum
2 clips
Torinome kasen p.
Kuroiso
Tochigi, 1998
C. granatum
1 clip
37 x 24 μm
Hiroshima, 1998
C. pachydermum
1 clips
Pref, Year
Cosmarium sp.
1 clips
Pref, Year
C. sportella
1 clip
48 x 38 μm
Hiroshima, 1998
C. ocellatum
1 clips
μm
Hiroshima, 1998
C. maculatum
3 clips
136 x 64 μm
Hiroshima, 1998
Cosmarium sp.
2 clips
111 x 66 μm
L/W=1.7
USA, 1999
C. moniliforme
1 clip
20 x 12 μm
Hiroshima, 1998
C. notabile ?
var. arcticum
1 clip
38 x 24 μm
single pyrenoid
Hiroshima, 1998
C. obsoletum
1 clip
64 x 64 μm
Hiroshima, 1998
Cosmarium sp.
2 clips
μm
Hiroshima, 1998
C. obsoletum
var. sitvense
1 clip
3 clips
64 x 64 μm
Hiroshima, 1998
C. margispinatum
1 clip
60 x 48 μm
Hiroshima, 1998
C. margispinatum
1 clip
60 x 48 μm
Hiroshima, 1998