Phenotypic structure of bank vole (Clethrionomys glareolus) population in Belarus

Phenotypic structure of bank vole, Clethrionomys glareolus, was studied on the basis of variations in M(3), M(1) structure and cranial foramens. The mean phene number increases from the centre to the north and the south of the Belarus region, The portion of rare phenes increases from the north to the south, but the number of asymmetrical individuals decreases in the same direction.