Frequency of occurrence of species of the Paramecium aurelia complex in Europe
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The scattered in the literature data on the occurrence and distribution of the Paramecium aurelia spp. complex in Europe are compiled in the present communication. The number of investigated clones and habitats as well as the ratio value (r.v.), i.e. the number of habitats for a defined species to the total number of habitats of the area were taken into consideration when the frequency of species occurrence was estimated. Among 8 species present in Europe, P. novaurelia is a dominant species (r.v. 0.45), P. biaurelia is a frequent one (r.v. 0.37), and P. primaurelia less frequent (r.v. 0.27). Other species are rare, i.e. P. tredecaurelia, P. pentaurelia, P. sexaurelia, P. triaurelia, and P. tetraurelia.
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E. Przybos, Department of Experimental Zoology, Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Slawkowska 17, 31-016 Krakow, Poland. E-mail: email@example.com