Zoochlorella

Zoochlorellen are green algae ( Chlorophyta ) from the (probably polyphyletic ) chlorella species that live as endosymbionts in ciliates such as Paramecium bursaria, amoebas and the cells of various multicellular animals such as those of the freshwater polyp Hydra viridissima and the Green Riesenanemone. The algae provide their host assimilates (30-40 % of its production ) and reflect it - in addition to protection by the larger organism - inter alia nitrogen compounds that would otherwise be discarded. Together with the equally living zooxanthellae, they provided the inspiration for the endosymbiont theory .. In a broader sense, other green algae that live in animals or protozoans, called Zoochlorellen, for example convolutae living in the flatworm Convoluta roscoffensis Tetraselmis.

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