Pediastrum duplex, a Pediastrum species which has -in contrast to Pediastrum boryanum- conspicuous intercellular spaces and with two "dents" per cell. (2) |
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| Pediastrum duplex var. rugulosum, a Pediastrum species with walls covered with granules. (1) |
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| Pediastrum duplex var. gracillimum, a Pediastrum species with thin cells. (3) |
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| Location: Sprockhövel, IG Metall-Bildungszentrum, Teich (1); Wahner Heid near , Cologne (2); |
| Habitat: Plankton (1); (2); (3) |
| Date: 3.06.06 (1); 13.08. 2009 (2); 8.10.2011 (3) |
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