Genus: Unicellular or colonial within a gelatinous sheath; planktonic; cell body spherical;
1 or several chloroplasts cup-shaped, with a pyrenoid
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species:
Similar genus --> Dictyosphaerium Planktosphaeria sp. ?,
cell body μm long, μm wide,
x 640, Shishizuka, Tsuchiura city, Ibaraki Pref., Japan, July 2003 by Y. Tsukii
31 μm
63 μm
94 μm; x 640