| 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. The arrowhead points to the opening of the dorsal antenna which is in the anterior half of the lorica. (1) |
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| Gastropus stylifer, the (extended) foot located ventrally in the middle of the body and has a single toe, which is in contrast to Gastropus hyptopus and Gastropus minor (both species with 2 toes). (1) |
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| Gastropus stylifer: focal plane on the trophi and the long (in contast to Gastropus hyptopus and Gastropus minor) prepharyngeal tube. (1) |
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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 of the virgate trophi. (1) |
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| Gastropus stylifer, another specimen from (2), focal plane on the red eyespot and lipid droplets. (2) |
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| Gastropus stylifer, specimen with resting egg . Focal plane also on the prepharyngeal tube (arrows) . (2) |
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| Location: Glörtalsperre (NRW) (1) |
| Habitat: Plankton (1; 2) |
| Date: 4.6.2009 (1); 29.12.2011 (2) |
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