Zonal distribution of bumblebee species (hymenoptera, apidae) in the North of European Russia

The bumblebee fauna of the North of European Russia includes 34 species. The trends in bumblebee diversity within the region are characterized. The species richness is the greatest in the middle taiga subzone and decreases from south to north, reaching its minimum in the Arctic tundra. Based on analysis of the zonal differentiation of bumblebee species, only four of them were found to be true arctic forms: Bombus ( Alpinobombus ) polaris , B . ( Al .) balteatus , B . ( Al .) hyperboreus , and B . ( Pr .) lapponicus glacialis , whereas the rest belong to the temperate, boreal, and subboreal groups.