| Gastropus stylifer, a very colorful rotifer due to the pink body liquid and the blueish hypodermis. Such pink liquid may be also found in the plankton rotifer Kellicottia longispina. |
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| Gastropus stylifer: focal plane on the trophi and the prepharyngeal tube. |
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| Gastropus stylifer: the arrows point to the long prepharyngeal tube which is used to suck phytoflagellates like Dinobryon. The prepharyngeal tube can be moved back and forth. Ra: ramus; Fu: fulcrum. |
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| Gastropus stylifer, another specimen from (2), focal plane on the red eyespot and lipid droplets. |
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| Gastropus stylifer, focal plane on the resting egg and the prepharyngeal tube (arrows) . |
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| Location: Glörtalsperre (NRW) / Heilenbecker Talsperre (NRW, 2010) |
| Habitat: Plankton |
| Date: 4.6.2009 (1); 29.12.2011 (2) |
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