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Chlorophyceae: Chlorococcales: Scenedesmaceae

Coelastrum sphaericum
Nägeli var. sphaericum (or sphericum ?)

Coelastrum Genus: Colonies spherical, with inner empty space; cells attached to each other by a protrusion of cell wall, arranged in a single layer; cell body mostly spherical with some conical or grobular bulges; chloroplasts cup-shaped with a pyrenoid; reproduction by asexual coenobium (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Colonies of 8, 16, or 32 cells, spherical or ovoid in shape; cells ovoid or cone-shaped, covered with a delicate gelatinous sheath; cells connected to one another by short gelatinous processes; inter cellular space small triangular; cells 6-25 μm diam. (Photomicrographs of the Freshwater Algae, 1996).


Coelastrum sphaericum ?, cell body μm long, μm wide, x 640, Kijioka Castle Ruin, Kodama town, Saitama Pref., Japan, June 2003 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Coelastrum Coelastrum Coelastrum Coelastrum

Coelastrum sphericum Nägeli var. sphericum: Colonies of 8, 16, or 32 cells, spherical or ovoid in shape; cells ovoid or cone-shaped, covered with a delicate gelatinous sheath; cells connected to one another by short gelatinous processes; inter cellular space small triangular; cells 6-25 μm diam. (Photomicrographs of the Freshwater Algae, 1996).


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