Andricus quercuscalicis
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Andricus quercuscalicis is a gall wasp species inducing knopper galls.
Galls (upper left and right) formed on acorns on the branch of a pedunculate (or English) oak tree by the parthenogenetic generation Andricus quercuscalicis.
A larva of Andricus quercuscalicis in a gall formed in Quercus robur
Red-pea gall
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The red-pea gall or red currant gall develops as a chemically induced distortion arising from the underside of the mid-rib of a vein on Quercus species and it is attached by a short stalk or peduncle.
