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- Kolpoda ren
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- Kolpoda cucullio
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- Kolpoda cucullus (=Colpoda cucullus)
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- Kolpoda cucullus (=Colpoda cucullus)
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- Paramecium aurelia
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- Paramecium aurelia
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- Paramecium aurelia
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- Paramecium aurelia
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- Paramecium aurelia
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- Paramecium aurelia (showing how Ehrenberg imagined the organism’s multiple “stomachs” were arranged)
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- Paramecium caudatum
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- Paramecium caudatum
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- Paramecium caudatum
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- Paramecium chrysalis (=Pleuronema crassum)
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- Paramecium chrysalis (=Pleuronema crassum)
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- Paramecium kolpoda (=Colpidium colpoda)
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- Paramecium kolpoda (=Colpidium colpoda)
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- Paramecium sinaiticum (a questionable species)ince the 19th century)
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- Paramecium ovatum (a questionable species)
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- Paramecium compressum (=Plagiotoma lumbrici)
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- Paramecium milium (a questionable species)
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- Uroleptus piscis
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- Uroleptus piscis
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- Uroleptis piscis
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- Uroleptus musculus (=Paruruleptus gallina)
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- Uroleptus musculus (=Paruruleptus gallina)
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- Uroleptus hospes (=Mucotrichidium hospes)
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- Uroleptus hospes (=Mucotrichidium hospes)
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- Uroleptus hospes (=Mucotrichidium hospes)
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- Uroleptus hospes (=Mucotrichidium hospes)
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- Uroleptus lamella
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- Uroleptus filum (=Spirostomum caudatum)
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- Uroleptus filum (=Spirostomum caudatum
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- Ophryoglena atra (=Frontonia atra)
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- Ophryoglena atra (=Frontonia atra)
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- Ophryoglena acuminata (=Frontonia acuminata)
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- =Frontonia acuminata)
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- =Frontonia acuminata)
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- Ophryoglena flavicans
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- Ophryoglena flavicans
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- Ophryoglena flavicans