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| Pediastrum tetras (Ehrenberg) Ralfs 1844 |
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| Pediastrum tetras (1) |
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| Pediastrum tetras (3) |
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| Pediastrum tetras (2) |
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| Location: Wahner Heide near Cologne (1)(Pediastrum tetras); Oberstueter, pond (1); Hiddensee, Suploch (pond) (3) |
| Habitat: Aufwuchs (1); (3); Mud/ between algae (2) |
| Date: 30.08.2012 (1); 30.07.2005 (2); 02.10.2018 (3) |
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