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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Whirligig Beetles (Gyrinidae) » Gyrininae » Dineutus
Photo#551245
species possible? - Dineutus
Copyright © 2011 roar

species possible? - Dineutus
Lancaster County, Pennsylvania, USA
July 23, 2011
My first Gyrinidae at a blacklight.
Dineutus emarginatus?
tag · login or register to post comments
Contributed by roar on 24 July, 2011 - 8:21pm
Last updated 7 November, 2011 - 7:39am

Moved
Moved from ID Request.
… Brad Barnd, 21 August, 2011 - 7:56pm login or register to post comments

Not [i]D. emarginatus[/i] bas
Not D. emarginatus based on what I see of the elytral apex. Do you have a ventral shot by any chance?
… Brady Richards, 24 July, 2011 - 10:02pm login or register to post comments

 
No, unfortunately I didn't get any
What's needed to get one of these to species?
… roar, 25 July, 2011 - 8:06am login or register to post comments

 
ok, narrowed down
I think I have it narrowed down to Dineutus assimilis or Dineutus carolinus, for they are the only ones with the correct amount of red on the front two legs.
… roar, 27 July, 2011 - 8:50am login or register to post comments

 
Sorry, I forgot to reply to y
Sorry, I forgot to reply to your question. Dineutus can be pretty easy to identify to species from photos even if you can't see the extruded naughty bits. The positioning of your specimen is perfect as one important character is the forefemur and whether or not the male has a tooth there. The ventral coloration is important so a ventral shot is a good idea. A clear shot (usually a close-up) of the tips of the elytra is very important. I can't quite make out what's going on with your specimen, but I can tell the elytral apices aren't rounded as they would be for D. emarginatus. Size of the specimen is also important for this genus.
… Brady Richards, 27 July, 2011 - 11:20am login or register to post comments

 
for ventral,
the underside is black. I can check the other stuff, since I have other specimens of the same kind.
… roar, 27 July, 2011 - 11:24am login or register to post comments

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