Species of the Paramecium aurelia Complex in Russia: New Stands and Overall Distribution

New stands of Paramecium biaurelia, P. triaurelia, P. tetraurelia, P. pentaurelia, P. novaurelia, and P. dodecaurelia were recorded in Russia. Especially interesting, is the record of P. novaurelia in Vladivostok, Russian Far East, as it is a very rare species Outside of Europe. The distribution of species of the Paramecium aurelia complex in Eurasia with emphasis on findings in Russia is discussed.