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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Predaceous Diving Beetles (Dytiscidae) » Dytiscinae » Aciliini » Acilius » Acilius sylvanus
Photo#14655
gray-brown diving beetle - Acilius sylvanus - female
Copyright © 2005 Robin McLeod

gray-brown diving beetle - Acilius sylvanus - Female
Parkhill Conservation Area, Middlesex, Ontario, Canada
April 8, 2005
Size: about 10 mm
Came up to surface of pond as I was shooting something else, and went back down immediately after this photo.
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Contributed by Robin McLeod on 9 April, 2005 - 11:41pm
Last updated 13 December, 2020 - 11:24am

Moved
Moved from Acilius mediatus.
… Matthew Pintar, 13 December, 2020 - 11:24am login or register to post comments

Thanks, Tim.
Moved from Acilius to A. mediatus page.
… Robin McLeod, 22 January, 2009 - 11:11pm login or register to post comments

A. mediatus
ID confirmed
… Tim Loh, 22 January, 2009 - 1:37am login or register to post comments

Moved
Moved from Predacious Diving Beetles.
… Boris Büche, 30 March, 2007 - 9:54am login or register to post comments

 
characteristics?
What identifies this as Acilius species? (i.e. how is it distinguished from species of Graphoderus and Thermonectus?)

I couldn't find any info on the web, and the species page is blank.
… Robin McLeod, 2 April, 2007 - 6:57pm login or register to post comments

 
characteristics
1. in female only (this one is): elytra longitudinally sulcate;
2. pronotal and head pattern: two tranversal dark bands each, on head the anteriour one undulate, on pronotum the bands are within the yellow basic colouration, and not terminal, as in Graphoderus;
3. elytral mottling (like "snow" in TV when the channel is off)less pronounced - characteric for Graphoderus.

:-)
… Boris Büche, 3 April, 2007 - 2:24am login or register to post comments

 
Thanks, Boris
I've added some info to the genus page...
… Robin McLeod, 3 April, 2007 - 6:18pm login or register to post comments

use of image
Hi,

I was wondering if you give permission to use your images? If so, could you please contact me at [stiverlm@muohio.edu.].

Thank you

Lisa Stiver
Hefner Zoology Museum
… lisastiver, 27 May, 2005 - 12:07pm login or register to post comments

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