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The major aim of this study was to establish the role and importance of the spruce bark beetle Ips typographus (L.) in increasing species biodiversity in spruce forests through phoresy of mesostigmatid mites. The study is a close examination of 26 041 specimens of I. typographus, which were carriers of 7210 individuals of mites, classified into 24 species. The most numerous species were Dendrolaelaps quadrisetus...
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