First American stand of Paramecium novaurelia and intra-specific differentiation of the species
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Astand of Paramecium novaurelia was found in Boston Massachusetts, USA, the first on this continent. Molecular studies (RAPD and sequencing of rRNA [ 3'SSUrRNA-ITS1, 5' LSU rRNA] and COI mtDNA fragments) of P. novaurelia strains show intra-specific polymorphism within the species as strain clusters characterized by variable relationships.
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Ewa Przybos, Department of Experimental Zoology, Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Slawkowska 17, 31-016 Krakow, Poland