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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Staphyliniformia » Hydrophiloidea » Water Scavenger Beetles (Hydrophilidae) » Sphaeridiinae » Megasternini » Cercyon » Subgenus Cercyon (Cercyon Subgenus Cercyon) » Cercyon praetextatus
Photo#445731
LRB (little round beetle) - Cercyon praetextatus
Copyright © 2010 Jerry Wilson

LRB (little round beetle) - Cercyon praetextatus
Elkland, Missouri, Dallas County, Missouri, USA
August 21, 2010
Size: 1.5 mm
I'm thinking "Scirtidae?" These have been abundant at my mercury vapor light every weekend this summer. The white markings on the elytra are distinct, but I don't see this pattern on others posted here.
This was my first attempt at focus stacking using CombineZM. Each stack is 4 pictures, creeping the focus rail downward with my MP-E 65. Clearly I need a lot more practice.

Images of this individual: tag all
LRB (little round beetle) - Cercyon praetextatus LRB (little round beetle) - Cercyon praetextatus LRB (little round beetle) - Cercyon praetextatus
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Contributed by Jerry Wilson on 22 August, 2010 - 6:18pm
Last updated 3 November, 2011 - 7:42pm

Moved tentatively
Moved from Cercyon. I don't see dorsal microsculpture, which would exclude C. connivens. Color pattern and slightly visible reddish spots on vertex of head indicate this is likely C. praetextatus, a common eastern species.
… Brad Barnd, 3 November, 2011 - 7:42pm login or register to post comments

Looks like C. connivens
but being from Canada, I'm not familiar with the southeastern US fauna so it's just a guess :)
… Tim Loh, 22 August, 2010 - 7:36pm login or register to post comments

Moved
Hydrophilidae: Cercyon sp.

Moved from ID Request.
… Brad Barnd, 22 August, 2010 - 6:39pm login or register to post comments

 
Hydrophilidae
Brad - thanks! These little guys are flying about 1/8 mile from my pond, probably.
… Jerry Wilson, 22 August, 2010 - 6:47pm login or register to post comments

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