Phylogenetic placement of two previously described intranuclear bacteria from the ciliate Paramecium bursaria (Protozoa, Ciliophora): ‘Holospora acuminata’ and ‘Holospora curviuscula’

‘Holospora acuminata’ infects micronuclei of Paramecium bursaria (Protozoa, Ciliophora), whereas ‘Holospora curviuscula’ infects the macronucleus in other clones of the same host species. Because these micro-organisms have not been cultivated, their description has been based only on some morphologi...

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