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Found at Mayville Ledge Beech-Maple Woods SNA in east-central Wisconsin in northern USA on 31.VII.2021. Found projecting 3-4mm out of trunk of debarked fallen hardwood tree in mixed hardwood forest. Looked relatively fresh, so presumably the adult had emerged not too long before I found the exuvium. Initially I presumed it was dipteran. Coleoptera was suggested on Bugguide. Confirmation/correction appreciated.

Bigger pics here.