Dasineura sp.
Roll-gall midge
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This midge induces monothalamous roll galls encompassing terminal leaves of twinberry. Galls are thick, dense, fleshy and ... [m]ost ... are rosy red ... The surface of the galls is covered with short, white, bristly hairs ...
”- Russo, Ronald A. : (2021) Plant Galls of the Western United States©