| russia | buryatia republic | microtus middendorffii | species | 5 | 0 |
| russia | chukotka autonomous okrug | microtus middendorffii | species | 7 | 0 |
| russia | mordovia republic | microtus middendorffii | species | 9 | 0 |
| russia | sakha republic | microtus middendorffii | species | 6 | 0 |
| russia | sakha republic | microtus middendorffii hyperboreus | subspecies | 1 | 0 |
| russia | yamalo-nenets autonomous okrug | microtus middendorffii | species | 14 | 0 |