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Chlorophyceae: Chlorococcales: Hydrodictyaceae

 Pediastrum duplex
Meyen var. rugulosum Raciborski

Pediastrum duplex Species: Colonies of 16, 32, 64 cells; marginal cells with two thick triangular processes with truncated apex; inncer cells broad H-shaped with deeply concaved sides; cell wall with irregularly reticulated ridges (Photomicrographs of the Freshwater Algae, vol. 18, 1997).

Pediastrum duplex var. rugulosum, colony about 80 μm in diam., x 640, Hasu-ike (pond), Shiga highland, Yamanouchi town, Nagano Pref., Japan, June 19, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Pediastrum duplex
Colony about 100 μm in diam., x 640
Pediastrum duplex

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