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Neuroterus numismalis gall wasp induced Silk button spangle galls on oak Arnhem the Netherlands. en Neuroterus numismalis gall wasp induced Silk button spangle galls on oak Arnhem the Netherlands nl Door Neuroterus numismalis galwesp veroorzaakte satijnen knoopgal op eik Arnhem Nederland own Bj schoenmakers cczero Uploaded