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Rather than a gall, could this be a pyrenomycete, with those brown, nipple-like projections surrounding the pycnidial ostioles?
I might just be imagining things.
Googled Pyrenomycete, came up with this, scared the life out of me. That's just to heavy, I will photograph anything relating to nature, but when it is not in my main field of interest,(Hemiptera), plus not in any literature I possess then I defer to the experts. So with all those toadstools after your name what more can I say.
PS I found a fungus today that I have only seen on the net, and in my fungi book. One of the eyelash species, Scutellinia scutellata, or so I thought. Yep, can only be ID'ed to species via a microscope. Post it soon...
Have a superb new year,
An iSpot Project- HELP WITH IDS - UK & Ireland Community - PLANTS
I'm certainly no expert! My main interest is lichens and lichenicolous fungi, and I am largely ignorant of fungi on plant material and non-lichenised fungi (eg Scutellinia), fascinating though they are.
Edit: I meant perithecial, not pycnidial ostioles. Of course. Anyway, I think microscope work is needed here.
All best wishes for 2013,
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