Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
 

Register · Log In
Clickable Guide
Interactive image map to choose major taxa Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

National Moth Week was July 19-27, and the Summer 2025 gathering in Louisiana, July 19-27

Photos of insects and people from the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2024

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27
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

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2025 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Plant Pathology, Entomology and Microbiology at Iowa State University logo

Printer Friendly Version 		Terms of Use
Privacy Statement
Site Map
Contact