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Photo#245813
Tooth-necked Fungus Beetle - Derodontus

Tooth-necked Fungus Beetle - Derodontus
The Arboretum, Guelph (N43º32'16.7"W080º12'49.8"), Wellington, Ontario, Canada
October 24, 2008
Size: 2.2 mm
I think I'm stuck on this one. I thought "Latridiid" when I saw it, but am not completely certain. It was found under bark.

Moved
Moved from Water, Rove, Scarab, Longhorn, Leaf and Snout Beetles. As far as I can tell, this could very well be D. esotericus. Coleoptera Checklist lists this and another species, Laricobius rubidus, for Ontario.

 
More on Derodontus
Pretty common in soft fungi growing on trees here in Westchester County, New York. Always find them in October-November, although that is when I look in fungi generally, so they may be around in the summer as well.

Wow, that was unexpected!
Thanks for pointing me in the right direction!
In terms of the discovery, well, I pretty much stumbled upon it.
The find was made along one section of a trail where there is a pond to the right side and forest to the left. The beetle was in a heavily-rotted section of a log about 3' long. Some kind of hardwood, as far as I can tell. Possibly maple. I'm not sure if the log was the beetle's home; the weather was quite cool and this guy could have been seeking shelter to overwinter. I was peeling bark as usual, and noticed the specimen on one flake which I nearly discarded without a glance.
Don't know if that kind of detail helps. I will be hiking the same trail several more times this winter. Let me know if there's anything else about the habitat that you want me to note.

nice find
We're having trouble locating this beast here in Wisconsin. I found some earlier this year down in Arkansas in a hardwood forest, but have been searching for years up here without success.

What was the habitat and what kind of tree? Thanks for any help you can provide.

 
The sole individual I found was
in mushrooms growing under very loose deciduous bark of a standing dead tree in January.

Try Derodontidae
Tooth-necked fungus beetle. That's what I would think it was if I found it. You can wait for an expert to confirm. I'm just a lawyer.

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