Abstract
Since Dryocosmus kuriphilus (Hymenoptera: Cynipidae) emerged worldwide as a dangerous pest of chestnuts, there is only one dubious record from Japan of a cynipid inquiline reared from its galls. This is the first comprehensively documented record of a cynipid inquiline, Saphonecrus kuriphilusi, new species reared from galls of D. kuriphilus in Greece. Morphological description, morphological and molecular diagnostic characters for the new species are given.
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