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Hydrophilid? - Cryptopleurum

Hydrophilid? - Cryptopleurum
Sexaur Park, Brookings, Brookings County, South Dakota, USA
March 12, 2007
Size: 2mm
I'm not quite sure what this is, it was swimming about like a water beetle, I'm guessing Hydrophilidae. Any help would be appreciated.

Cryptopleurum sp.
probably minutum but tough to tell from picture

Moved from Cercyon.
So it is better if it stays at subfamily level for now.

More likely
is a Cryptopleurum based on the marked sculpturing of the dorsum.

Moved from Sphaeridiinae.

Yes, Hydrophilidae
subf. Sphaeridiinae, terrestrial one, near Cercyon.

vote for Cercyon
we'll get to sp., hopefully

I dont know about this one, Michael, but
I want to say, "What an amazing and inspiring haul!"

I'm taking my net with me now to skim for beetles in the snowmelt pools.

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