Rhopalomyia californica gall with odd hole - Rhopalomyia californica
Carpinteria Salt Marsh, Carpinteria, Santa Barbara County, California, USA
December 26, 2011
Size: 11 mm (gall)
After giving it some thought, I went back to the marsh and removed to gall so I could bring it home and examine it more closely. Here's an image that gives a better view of the brownish discoloration around the exit hole, which I've now measured more carefully and decided is about 1.8 mm in diameter.
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