Dear Janet,
I've just seen your gall images, and catching up on the opinions of the wise.

I am certain that the gall on shoot image is of a sexual generation
NEuroterus quercusbaccarum.

I think the other galls on the bark are probably sexual generation
Trigonaspis megaptera. The more variable gall shape, and the cross
section, match illustrations of this species and my own limited
experience of finding them in continental Europe. I don't have a
photograph of this gall to compare Richard's with, though, or i'd post
it.

Would you put me in direct contact with Richard? I am compiling a set
of images for a big book on oak galls, and would love to ask him if we
could use a higher resolution version of this picture. Even better
would be to get a sample of the galls. Even if he doesn't have adults,
we can tell very quickly what the gall inducer is from a larva or
pupa, for sure!

Sincerely,

Graham Stone




Quoting Janet Boyd <janetboyd_entomologist@...>:

>
>
> Hi,
>
> I received this request last night - could someone identify the
> galls for Richard?
>
> Janet
>
>
>
>
>
>>
>> I work for Forest Enterprise Scotland as their native woodland
>> ecologist. I was asked to identify a gall earlier this week and, despite
>> spending some time reading through Redfern et al, I could not
>> confidently identify it as the gall concerned was on the bark (on burrs
>> ) of oak trees as well as on the shoots. The wood is in Dunbartonshire
>> (just west of Glasgow) low elevation. I wonder if you would be good
>> enough to identify the species for me?
>>
>> Many thanks,
>>
>> Richard Thompson
>>
>>
>
>
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