| Cosmarium biretum; dividing specimens; focus plane on the center of the cells |
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| Cosmarium biretum; dividing specimens; focal plane on the cell surface |
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| Cosmarium biretum; another dividing stage (3) |
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| Cosmarium biretum; focus plane on the center of the cells (2) |
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| Cosmarium biretum; focus plane on the cell wall. (2) |
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| Cosmarium biretum; focus plane on the cell wall of a macerated specimen. (2) |
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| Cosmarium biretum; specimens from. (4) |
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| Location: Nature reserve Heiliges Meer, Sphagnum/ Utricularia pond (1); Wodantal, Hattingen, ephemeral puddle (2); (3);Kerkpad, Hollum, Ameland, NL, Kerkpad, trough (4) |
| Habitat: Periphyton / detritus (1); (2); (3); detritus (4) |
| Date: 13.09.2011 (1); 05.02.2016 (2)13.09.2011 (1); 18.04.2017 (3); 21.10.2018 (4) |
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