| Aulacoseira granulata var angustissima forma spiralis. In the center of the image a young Keratella rotifer is trapped. |
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| Aulacoseira granulata var angustissima forma spiralis; detail; focus plane on the pores of the cell wall. |
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| Location: nature reserve NSG Unteres Odertal; BB, Germany; |
| Habitat : on artificially exposed micro-slides |
| Date: 28.05.2022 |
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