OAK LEAF SAUCER GALL

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Oak Leaf Saucer Gall

This saucer shaped gall is produced on the leaves of Oak trees by the gall wasp Andricus gigas.

These are not to be confused with a nest of wasp eggs but are actually leaf tissue induced to grow in this manner by enzymes supplied by the wasp when the egg is deposited. I have been unsuccessful at finding an egg by dissection and have to take it all on faith.

It would also be nice to get a photo of the wasp itself but I can't even find one on the internet much less a live one.

Maybe next year.