| Collotheca mutabilis; this pelacic rotifer has two red eyespots on the dorsal lobe of the corona even in the adult stage (in contrast to other Collotheca species where the eyespots are reduced in the adult stage). (2) |
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| Collotheca mutabilis; specimen from (3) with a mucilaginous sheath, which is secreted by the integument. |
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| Collotheca mutabilis; same specimen as above. Optical longitudinal transect of the anterior region, lateral view, focus plane on one of the red eyespots. (3) |
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| Collotheca mutabilis; same specimen as above. Focus plane on the dorsal lobe with two red eyespots. (3) |
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| Collotheca mutabilis; specimens from (1). Left: sometimes the foot is thickened an the posterior end. |
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| Collotheca mutabilis; another specimen from (1), contracted |
| Location: Glörtalsperre / NRW (1); Wuppertalsperre, NRW, Germany (2); Bodensee bei Bodman (3) |
| Habitat: Plankton (1) (2); Periphyton (3) |
| Date: 4.6.2009 (1); 27.05. 2011 (2); 29.09.2017 (3) |
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