EN
A comparative karyotype analysis of two populations of Podisma sapporensis showed that :2n male=22 + XO and 2n female = 22 + XX, the X chromosomes are subacrocentric as a result of the inversion within a population derived from Sakhalin; 2n male=20 + neo-X+neo-Y and 2nfemale=20 + neo-XX, as a ersult of X autosome translocation in population from the Kurile Islands (Kunashir).