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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Staphyliniformia » Hydrophiloidea » Hydrochidae » Hydrochus
Photo#1107842
Hydrochus pseudosquamifer ? - Hydrochus
Copyright © 2015 Robert Vigneault

Hydrochus pseudosquamifer ? - Hydrochus
Oka, Deux-Montagnes County, Quebec, Canada
July 12, 2015
Size: 3 mm
From Hg lamp trap.
tag · login or register to post comments
Contributed by Robert Vigneault on 23 July, 2015 - 1:50pm

Moved for expert attention
not sure species IDs are possible from photos, but hoping for the best

Moved from ID Request.
… v belov, 23 July, 2015 - 2:12pm login or register to post comments

 
It should be that species though...
From Downie & Arnett's key to Hydrochus species, it went as follow:

1- Elytra not or only slightly inflated behind middle > 3

3- Length less than 4.5 mm > 5

5- Surface of head and pronotum granulose with isolated rounded, metallic spots on top of granules > 6

6- Elytra intervals inconspicuously, not densely granulate, always with some long metallic stripes > 7

7- Length 2.3 - 3.6 > 8

8a- Head, pronotum and elytra with spots larger and more distinct; usually deeper; length 2.6 - 3.0 mm...H. pseudosquamifer

8b- Head, pronotum and elytra with metallic round spots on top of granules distinctly smaller and often indistinct; length 2.3 - 3.0 mm...H. neosquamifer
… Robert Vigneault, 23 July, 2015 - 2:47pm login or register to post comments

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