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For Insects, Spiders & Their Kin
For the United States & Canada
Photo#178161
Large Gall? - Amphibolips

Large Gall? - Amphibolips
Norfolk, Virginia, USA
April 19, 2008
Size: Golf Ball
Another similar gall found in young oak tree.

Images of this individual: tag all
Large Gall? - Amphibolips Large Gall? - Amphibolips

Moved

Moved
Moved from Gall Wasps.

Yes
A so-called "oak-apple" (at least, in French language). They develop from a batch of "winter eggs" laid by an agamous female of Cynipidae (Gall Wasps) into the - then still closed - buds.

 
I was tempted to open
one of these to see what was inside. Couldn't bring myself to do it though. This is the third one I've found in the last week.

Thanks for the ID!

 
If you haven't already opened
If you haven't already opened one >>>
Also - Amphibolips confluenta

If a twig with one of these growing on it, is placed in a tube of food coloring, the dye will flow through the twig and into the internal filaments of the gall.