| Phacus horridus, a species with rows of small spines oriented backwards on the pellicle. Also in focus are some of the disk-shaped chloroplasts.. |
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| Phacus horridus, optical longitudinal transect; focus plane on the characteristic anterior projection near eyespot (arrow), a trait which is in contrast to Phacus monilatus suecicus. Also visible is the nucleus (N). The arrowhead marks the contractile vacuole. |
| In both images the anterior flagellum is out of focus. |
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| Sample courtesy of Dr. Martin Kreutz; Litzelstetten. |
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| Location: Simmelried near Konstanz, pond II |
| Habitat: in the boundary layer betwen the water and the anoxic mud (upper 10cm of the mud) |
| Date: 03.09.2021 |
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