| Keratella serrulata var. curvicornis; focal plane on the ventral side of the lorica showing the granulated surface. In contrast to K. serrulata serrulata this taxon lacks the spines at the posterior part of the lorica. |
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| Keratella serrulata var. curvicornis; another specimen. |
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| Keratella serrulata var. curvicornis; small dents on the anterior margin of the ventral plate of the lorica . |
| see also Keratella serrulata serrulata |
| Location: Nord-Sued-Kanal / Twist/ Germany |
| Habitat: Plankton |
| Datum: 1.5.2009 |
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