| Mytilina mucronata var. spinigera, lateral view. In contrast to Mytilina mucronata var. mucronata in this variety the posterior part of the lorica tapers into a spine (arrowhead). |
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| Mytilina mucronata var. spinigera, dorsal view. The dorsal spines on the anterior and posterior parts of the lorica are clearly visible. |
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| Mytilina mucronata var. spinigera, double keel on the dorsall side of the lorica. |
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| Mytilina mucronata var. spinigera, lateral view showing the dorsal and ventral spines of the lorica. |
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| Location: Gevelsberg, Grünes Klassenzimmmer, Teich |
| Habitat: between algae, detritus |
| Date: 18.03.2009 |
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