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Photo#1310806
unknown

unknown
Donalds, Abbeville County, South Carolina, USA
November 2, 2016
Trying here as a last resort. This fuzzy material I find quite frequently on the underside or side of logs where polypores are growing. I first tried mushroomobserver.org but it was suggested there that I try here, with one person saying they often see this associated with Stereum fungi. Is it possible this is bug related?

Edit: I found 5 logs with copious amounts of this soft fuzz this morning. After carefully pulling back the fuzz I found beetle larvae underneath the fuzz on all 5 logs. On a 6th log with a couple of clumps of black fuzz I found cast off beetle skin underneath. Pictures to come, I think platydema larvae.

Moved
Moved from ID Request.

 
made by beetle larvae
I eventually found these, possibly Platydema, beetle larvae everywhere I found the fine thready stuff. Larva here.

 
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How did you conclude that the beetle larvae were producing the material?

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