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casebearer beetle - Exema

casebearer beetle - Exema
Cedar Rapids/ICNC, Linn County, Iowa, USA
June 6, 2010
Size: 3-4mm
Don't know if this pic is useful, but I was excited to have found one of these finally. Found in sweep net.

Moved from ID Request.

I agree that it is probably Exema. At least we can be sure that it belongs in that tribe

Were you sweeping goldenrod, by any chance?
It somewhat resembles the case of Exema spp., but I wouldn't call it that for sure without knowing the host plant.

but lots of other stuff with the goldenrod-milkweed, dock, small willows, grasses

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