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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Predaceous Diving Beetles (Dytiscidae) » Agabinae
Photo#380058
Burrowing Water Beetle?
Copyright © 2010 Graham Montgomery

Burrowing Water Beetle?
Houston, Harris County, Texas, USA
March 27, 2010
Size: 10 mm
Found buried in soil.

Images of this individual: tag all
Burrowing Water Beetle? Burrowing Water Beetle? Burrowing Water Beetle?
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Contributed by Graham Montgomery on 27 March, 2010 - 11:01pm
Last updated 23 November, 2010 - 1:50pm

Moved
Moved from Colymbetinae.
… Tim Loh, 23 November, 2010 - 1:50pm login or register to post comments

Thanks
I have added a ventral view. Also, after remeasuring him, I have revised it down to 10 mm. Thanks!
… Graham Montgomery, 28 March, 2010 - 9:30am login or register to post comments

Moved
Moved from Hydaticus.
… Tim Loh, 28 March, 2010 - 1:25am login or register to post comments

must be male Hydaticus [maybe H. aruspex w/dark pronotum?]
Tim Loh may have a better idea, though

Moved from Ground and Water Beetles.
… v belov, 27 March, 2010 - 11:15pm login or register to post comments

 
Not a Hydaticus
There are no all-black nearctic Hydaticus; this is a Colymbetine: doesn't quite fit Agabus as size seems to be tad bit too large (there are only 1 or 2 species that reach 12 mm but are not present in TX); the other possibility given locality would be Hoperius, which is not yet in the guide (it would be a very nice find as it is rare!) and I haven't been able to find images of. A ventral shot will help clear up the confusion here.
… Tim Loh, 28 March, 2010 - 1:21am login or register to post comments

 
pale margin all around the dorsum; and large suction disk
clearly visible on right foretarsus
see full-size image
… v belov, 28 March, 2010 - 7:57am login or register to post comments

 
Suspect Hoperius planatus
Based on wide margin of pronotum and flat prosternum fitting into a triangular notch at the metasternum. Size seems a bit small but adults of this eastern species have been rarely collected. The pale margin seems to be an artifact (reflection) from the camera flash. I will forward these images to Mike Quinn who will in turn get these to a local expert for confirmation.
… Tim Loh, 28 March, 2010 - 11:50am login or register to post comments

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