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Oak galls from Ontario - Andricus quercuspetiolicola - female

Oak galls from Ontario - Andricus quercuspetiolicola - Female
Guelph, Ontario, Canada
Size: scale bar indicated
Interested in genus-level identification of both inducer and inquiline cynipidae. Unfortunately, some images do not have all adult insects. Therefore, even if the inducer (or inquiline) is not in the image, I am still hoping for an identification of all cynipids associated with the gall shown. Thank you for your time.

Input from a cynipid expert
Here is a good illustration of why it is important to post images of different individuals separately. I showed Dr. Zhiwei Liu this photo, and he says: "The 'female' is a female, but looks like an inquiline of the Synergus complex. The 'male' is a female of the gall maker." If you still have your reared cynipid specimens, Dr. Liu would be interested in examining them and would provide identifications for you. His contact information is here.

Andricus quercuspetiolicola
Moved from ID Request.

I am assuming that this is white oak, and that the apparent pointed lobes on one of the leaves in the lowest photo is an illusion caused by the viewing angle. My ID is based entirely on the galls; I do not have the expertise to say whether the wasps that emerged are the gallmakers or are inquilines. I do not know what features are necessary to make an ID, but to maximize your chances of getting help (in the event that a cynipid specialist joins the BugGuide community), you should post images at the maximum magnification/resolution possible, ideally at a few different angles. (This comment goes for all of your submissions.) Many experts simply make identifications based on what they are able to see in the photos that have been submitted, and do not take the time to request additional images showing particular features. Bear in mind that most viewers are not able to see the full-sized image you submitted; they see the resized version.

Here is the only other image we have of a wasp from one of these galls:

Inquiry of Inducers and Inquilines
I read this comment from you after a I posted a previous reply.

I do have the Weld book of North American galls and have been able to narrow the possible identifications. Unfortunately, my primary interest was "Is this adult an inducer or an inquiline"?

Initially, I received some grief for my untagged photos, and I have taken considerable time to upload images to the correct preference. However, I am realizing that grief over oak species and tagging photos will not resolve the primary question.

If I will not be able to identify adults, searching for more photos to tag or searching for large images of oak leaves seems of limited value to my primary question, no?

See my response
here. If you have the Weld book, then you are better positioned than anyone on BugGuide to identify the adults, as far as I know. I believe that is the most up-to-date key to adult cynipids and cynipid galls from eastern North America.

It seems to me that identifying the gallmaker (by identifying the gall) goes a long way toward identifying the insects that have emerged from the gall. I didn't realize you ONLY cared whether the adults were gallmakers or inquilines, and didn't care what species the gallmakers were. Still, it would seem that knowing what species produced the gall would give you a short list of possible suspects, which you could find using the Krombein reference, and if you were so motivated, you could look up the original description of each suspect, which you will find cited in Krombein (and in Weld too, I presume).

Tagless by accident
Thank you for attempting to identify the genus.

Each individual collage photo/slide is of the same gall. Also any cynipid in the collage is from the same gall. Some images are at different magnifications.

I understand that tagging photos is a preference, but at the time I uploaded the photos I was not aware of this procedure.

If I separate the collage photos at this time and tag several indiviual photos from the group, then it would not allow for easier identification. Any tagged photos from this set would be the same photos, but scattered throughout individual jpegs instead of one simple collage photo.

In the future, I will gladly upload individual photos and tag them all. Forgive the simple error of a first time user for not tagging a first submission. I do hope to get more photos during the summer of 2011, and those will be tagged.

Welcome to Bugguide
Your images are valuable. I hope to see more in the future. It is a steep learning curve at the beginning when you join this site, especially if you are trying to show related subjects which are not the same specimen. I have done that several times. There are two ways of linking images, one is by using the "same individual" submission and another is by using the [thumb#] function, where # is the node number (491051 in this case). See some examples here:

I hope that this helps. Don't hesitate to ask for help either here or in the forums. There are lots of helpful people here.

it's a big job, i know...
...but the experts may be reluctant to comment on those 'collages': as far as i know, the policy of this site is to accept one photo on each image -- and only images of the same individual can be linked.
you can link a wasp image with a photo of the gall it was reared from, but that's it

too bad really
Examples like this can be really educational.

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