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Spiny Witchhazel Gall Aphid

Affected Species: 

The aphid produces raised ribs or “corrugations” on the upper leaf surface that match deep furrows between the veins.

http://extension.msstate.edu/newsletters/bug%E2%80%99s-eye-view/2024/spiny-witch-hazel-gall-aphid-vol-10-no-07