TG3106 : Oyster galls on oak

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

This is 1 of 2 images, with title Oyster galls on oak in this square
Oyster galls on oak
Oyster galls on oak
The tiny galls > LinkExternal link are caused by the oyster gall wasp, Neuroterus anthracinus, and measure 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 > LinkExternal link. 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.
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TG3106, 218 images   (more nearby )
Photographer
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Date Taken
Saturday, 19 August, 2017   (more nearby)
Submitted
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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