The paramecium strain, originating from Japan, Yamaguchi, belongs to Parame
cium jenningsi (type of micronuclei, appearance of autogamy, presence of tw
o macronuclear anlagen, dimensions of cells, and the RAPD fingerprints). Th
e finding of Paramecium jenningsi in Japan enlarges the range of the specie
s believed to be limited to a warm or even tropical climate.