image_list image_listE

Chlorophyceae: Chlorococcales: Hydrodictyaceae

 Pediastrum integrum
Nägeli var. integrum

Pediastrum integrum Genus: Colonies of a fixed number of cells, flat, circular in shape; cell body polygonal in shape, with horn-like projections; cell wall garanulated, wrinkled or notched; chloroplasts plate-like or reticular; asexual reproduction by zoospore; sexual reproduction by isogametes (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Colonies of 16, 32, 64 cells, subcircular or oval shaped, without perforations; basal parts of the marginal cells obtrapezoid or subpentagon; outer sides of the marginal cell with two small truncate processes having low-triangular base; cell wall granulated (Photomicrographs of the Freshwater Algae, vol. 3, 1985).

Pediastrum sp., similar to P. boryanum, colonies of cells, colonies μm in diam., cell body μm long, μm wide, x 640, Seseragi Park, Musashi-Urawa, Saitama city, Saitama Pref., Japan, August 2002 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
When young, horn-like processes close together
Pediastrum Pediastrum Pediastrum
When matured, horn-like processes do not grow but separated from each other as the cell size increase
Pediastrum Pediastrum Pediastrum Pediastrum

Please click on images for viewing enlarged.
Copyright Protist Information Server