#genus_Microtus__Microtus  voles of the northern hemisphere
  supertype:  #mammal_genus  a genus of mammals
  member of:  #family_Cricetidae
  member:  #meadow_vole__meadow_mouse__Microtus_pennsylvaticus  widely distributed in grasslands of northern United States and Canada
  member:  #Richardson_vole__water_vole__watervole__Microtus_richardsoni  of western North America
  member:  #prairie_vole__prairievole__Microtus_ochrogaster  typical vole of the extended prairie region of central United States and southern Canada

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