TG3106 : Oyster gall on oak

taken 1 year ago, near to Surlingham, Norfolk, Great Britain

This is 1 of 6 images, with title Oyster gall on oak in this square
Oyster gall on oak
Oyster gall on oak
The tiny gall > LinkExternal link is caused by the oyster gall wasp, Neuroterus anthracinus, and measures only 2-3mm across. This gall wasp produces both sexual and agamic generations and hence forms two distinct galls, the oyster gall and the April-bud gall. The oyster gall is found on the leaf underside, rarely above and it is attached to the midrib or a main vain of the leaf with flaps of tissue. The parthenogenetic females of the agamic generation hatch from the oyster galls and lay their eggs within the buds, resulting in the sexual generation which emerges from the April-bud gall > LinkExternal link.
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TG3106, 233 images   (more nearby )
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Date Taken
Saturday, 19 August, 2017   (more nearby)
Sunday, 20 August, 2017
Geographical Context
Wild Animals, Plants and Mushrooms 
Subject Location
OSGB36: geotagged! TG 3127 0673 [10m precision]
WGS84: 52:36.5447N 1:24.8605E
Camera Location
OSGB36: geotagged! TG 3128 0671
View Direction
North-northwest (about 337 degrees)
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Image Type (about): close look 
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