I asked Hedgerow about this recent and he said -
Quote:
Hi goosey,
Having looked through the British Plant Gall Society handbook for gall recognition again, I have to admit coming up with nothing.
Other than that is a guess based on a hunch so what follows can be comfortably ignored.
I have many Cynips divisa galls of which some have a shrivelled and conveluted appearance in various sizes and states of maturity. These I have assumed to be failed galls for some reason or another whilst still immature enough for the gall material to be soft and fluid filled which then dry out and with the loss of fluid also lose volume, thus the outer layers would take on a deflated balloon appearance.
You say that it is slightly smaller than a cherry gall Then I could say it may be a failed one.
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So unless anyone else comes up with a different ID or explantion I will say that this is an image of a Failed Cherry Gall!
PS I realise now this should have actually gone on to the insect forum not here
, but at least I have been able to move the photo's to the right gallery!