Quite right Karsten
I should look more closely - I completely missed the size scale!
I have a pic of a young fecundator somewhere, I will dig it out for comparison. I agree that a bud affected by grossulariae or lucidus is a possibility, perhaps with grossulariae being the most likely as it is more robust and, in my experience, more common.
Another possibility for A is, as you say, A. aries. Redfern et al suggest that when attacked by an inquiline (Synergus spp.) the bulbous base of the gall becomes enlarged. I have just looked through my collection and I have a very similar specimen queried as "A.aries, inquiline?"
Regards
Scotty
Karsten Schonrogge <ksc@...> wrote:
Karsten Schonrogge <ksc@...> wrote:
Hi there,
just to add to Frazers pictures:
The gall A is about 2-3 times the size of an A. solitarius. Also
the tip is somewhat broken off (difficult to see on the photo). If
it wasn't as bulbous as it is, it would be straight forward A.
aries - it's just too big.
Gall B is sort of lying on its side and it's spindle shape might not
be clear, but you can see the ribs along the gall. I'm convinced it
had a short stalk and would have made it A. callidoma. The
alternatives, A. malphigi (no stalk) and A. seminationis (normally
not as symmetric) seem less likely. However, these galls are rare
enough that other people here might have more experience than me.
Gall C is a real mystery to me, at least in the UK. I agree it must
be a young stage in July, but does A. fecundator go from the
small "nobbely" processes seen in the picture to the more leafy
scales on the mature gall. I was thinking along the lines of A.
lucidus or A. grossulariae - I know they tend to be more often on
acorns, but among these young trees there are very few with acorns
and A. lucidus certainly can induce galls in buds.
Happy guessing and every suggestion is welcome.
Best wishes
Karsten
--- In british_galls@yahoogroups. , Scotty Dodd <jaapiella@.co.uk ..>
wrote:
>
> Hello Frazer and welcome to the group
>
> My suggestions for your galls, following Redfern et al, 2002,
are;
> A = Andricus solitarius (asexual) mature gall
> B = Andricus solitarius (asexual) young gall
> C = Andricus fecundator? (asexual) young gall (not as sure with
this one).
>
> Good luck with the project, feel free to tell u more about it
sometime.
>
> Regards
>
> Scotty
>
> frazer_sinclair <frazer_sinclair@...> wrote:
> Dear all
> I am new to this group and am about to start a PhD project
involving
> Cynipid gall wasps and oak trees. During some preliminary work
this
> year I have encountered a few galls that I am unsure of, and was
> hoping that someone might be able to help. I have posted some
images
> in a photo album called "Frazers". Any suggestions on what galls
they
> might be would be greatly appreciated.
> Thanks
> Frazer
>
>
>
>
>
>
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