The occurrence of species of the Paramecium aurelia complex was studied in material collected in 1995 in Baden-Wurtternberg, Germany. Also five strains collected previously in MOnster (Westphalia) and Stuttgart (Baden-Wurttemberg) were identified. Identification was carried out by mating the clones with the mating types of the standard strains of known species of the P. aurelia complex. The presence of P. biaurelia, P. triaurelia, P. sexaurelia, and P. novaurelia was revealed. All species were found in Stuttgart or in its neighbourhood (Baden-Wurttemberg), and two species (P. biaurelia and P. novaurelia) in the material from Monster (Westphalia). In some strains endosymbionts were found, Caedibacter sp. PREER, PREER, JURAND (1974) in the cytoplasm, and Holospora caryophila PREER and PREER (1982) in the macro-nucleus.
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