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Fuzzy Oak Gall - Andricus quercusflocci

Fuzzy Oak Gall - Andricus quercusflocci
Camden County, New Jersey, USA
November 4, 2009
Size: +/- 1cm
I found this gall firmly attached to an Oak leaf today. Inside this soft, fuzzy gall was a small, hard pill shaped "egg" with an even smaller white larva inside of it.

Any ideas what wasp created this gall?

Images of this individual: tag all
Fuzzy Oak Gall - Andricus quercusflocci Fuzzy Oak Gall - Andricus quercusflocci Fuzzy Oak Gall - Andricus quercusflocci

It looks like
at least one of these has hatched! There is a tiny wasp alive right now in the container. Hopefully I can get some decent pics!

Moved from Gall Wasps.
Check out the description on the guide page and see if it matches. This species wasn't in the book I was using before, which explains why I couldn't find it!

Thanks for your research! I know very little about these wasps, so I'll go with your suggestion. I do still have these in a sealed container in a refrigerator (I'm guessing they might need the cold season) so we'll see what emerges! I'll post more images when that happens.

Moved from ID Request.

Oak species?
From what I can see, this looks like a white oak leaf--can you confirm? Also, was this attached to the midrib or a side vein?
Knowing that there was just one cell inside is helpful, and I'm optimistic that this will be identifiable.

White Oak
It looks like a white oak leaf to me and this gall was attached to it's midrib.

I've uploaded a larger, fuller version of this image that better shows the leaf and gall.

the closest match I can find in Felt (1) is Andricus quercusflocci: "Woolly, whitish mass on underside of the leaves, usually along the midrib, diameter 1/3 inch, containing a mass of small one-celled galls, on white oak." The "whitish" and "mass" don't fit, of course. Maybe the answer is in Weld (2), or maybe no one has ever described this species. If anything has been published about eastern cynipid oak galls in the past 50 years, I haven't come across it yet.

for your research. I am reasonably certain that this is not Andricus quercusflocci, because I do see those galls quite frequently (I think) and this one is different. I will go back to the area today where I found this gall and attempt to find another. If I do find one, I will save it in a sealed container in an attempt to see what emerges. I'll be sure to keep you updated here.

I've requested a copy of Weld (1959) through interlibrary loan, so hopefully soon I'll be able to make some headway in the unidentified eastern cynipid galls.

If you do end up rearing any cynipids to adulthood, I'm pretty sure you'll need to get the specimens to a specialist in order to get a definite ID. I'm not sure who that would be at this point, but I guess we'll cross that bridge when we get to it.

I now have 3 of these leaves/galls in a sealed container, so hopefully something emerges!

Also, I found a fourth gall, but it looks like a crab spider found it first! (see new image)

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