Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Home
» Guide »
Arthropods (Arthropoda)
»
Hexapods (Hexapoda)
»
Insects (Insecta)
»
Beetles (Coleoptera)
»
Polyphaga
»
Series Staphyliniformia
»
Hydrophiloidea
»
Helophoridae
»
Helophorus
Photo#14657
Copyright © 2005
Robin McLeod
underwater beetle -
Helophorus
Ailsa Craig, Middlesex, Ontario, Canada
April 7, 2005
Size: 7-8 mm
The beetle seems coated with mud. I wonder whether it's the same kind as the one I saw
last year
about 10 minutes from here.
Images of this individual:
tag all
Contributed by
Robin McLeod
on 9 April, 2005 - 11:58pm
Last updated 26 April, 2005 - 9:38am
Helophorus grandis
With the size and the locality, it can only be
Helophorus grandis
, the biggest member of this genus in North America.
…
Pierre-Marc Brousseau
, 3 May, 2007 - 10:10am
Thanks for checking, Pierre-Marc
However, I'm not very confident on the size estimate of 7-8 mm. It could be off by a couple of millimetres.
Also, there's 14 other species of
Helophilus
listed for Ontario in
this PDF doc
, and I'd like to have more info on them before calling this one
grandis
.
…
Robin McLeod
, 3 May, 2007 - 7:37pm
Based on Smetana (Review of t
Based on Smetana (Review of the Family Hydrophilidae of Canada and Alaska), the only other species bigger than 5 mm in Ontario is
Helophorus oblongus
that is between 4.2 and 6.3mm. The two species are easy to distinguish, but we need to see the elytral stries, what isn't the case on the pictures.
…
Pierre-Marc Brousseau
, 3 May, 2007 - 8:41pm
Very cool
Very cool beetle. You have got me wanting to look for these! Nice photo.
--Stephen
Stephen Cresswell
Buckhannon, WV
www.stephencresswell.com
…
Stephen_WV
, 10 April, 2005 - 8:20am