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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Staphyliniformia » Hydrophiloidea » Helophoridae » Helophorus » subgenus Rhopalohelophorus (Helophorus subgenus Rhopalohelophorus) » Helophorus linearis
Photo#554404
Helophorus linearis - male
Copyright © 2011 Brad Barnd

Helophorus linearis - Male
Hancock County, Indiana, USA
July 3, 2011
Size: 3 mm
Collected at UV light.
tag · login or register to post comments
Contributed by Brad Barnd on 29 July, 2011 - 10:34pm
Last updated 26 January, 2013 - 7:48pm

Is there any way
to reliably distinguish this species from H. lineatus? Both are on record here in ND, but based on the images for both species here, and the keys that I have, I don't see any difference!
… Guy A. Hanley, 6 August, 2014 - 1:18pm login or register to post comments

 
Maxillary palps
It's whether the apical segment is "short" or "elongate". H. orientalis is also very similar and occurs in ND. The species are not easy to tell apart sometimes. Check Smetana's revision (1) for more exhaustive treatment of the species. I have a copy if you would like one.
… Brad Barnd, 7 August, 2014 - 12:43am login or register to post comments

 
Yes
We are going to need to get that pub, we have been collecting the state quite heavily this summer, and have lots of material to identify..
… Guy A. Hanley, 7 August, 2014 - 8:43am login or register to post comments

 
Sent you an email
Let me know if you don't get it.
… Brad Barnd, 7 August, 2014 - 1:28pm login or register to post comments

 
Helophorus
I collected several specimens of Helophorus from Spruce Woods Provincial Park in southern Manitoba, but with 17 species recorded for the province, identifying these to species level sounds like quite a challenge, even with a copy of Smetana's revision. This genus sure has interesting sculpture on the pronotum and elytra. I plan to send in some photos.
… Robert E. Wrigley, 24 November, 2014 - 11:45pm login or register to post comments

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