Iteomyia sp. C
Appressed Tooth Gall Midge
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Although superficially similar to galls of Iteomyia sp. A, galls of this midge differ in that they form on the ventral leaf surface flat against the leaf rather than hanging down.
Host: Salix barclayi and perhaps other willows in the subalpine environment of mountains
”- Russo, Ronald A. : (2021) Plant Galls of the Western United States©