Noun spruce bark beetle has 1 sense
  1. spruce bark beetle, Dendroctonus rufipennis - small beetle that likes to bore through the bark of spruce trees and eat the cambrium which eventually kills the tree; "the spruce bark beetle is the major tree-killing insect pest of Alaska spruce forests"
    --1 is a kind of bark beetle
    --1 is a member of Dendroctonus, genus Dendroctonus
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