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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Predaceous Diving Beetles (Dytiscidae) » Hydroporinae » Hydroporini » Hydroporina » Hydroporus » Hydroporus striola
Photo#168041
Dytiscid? - Hydroporus striola
Copyright © 2008 tom murray

Dytiscid? - Hydroporus striola
Groton, Middlesex County, Massachusetts, USA
February 2, 2008
Size: 3mm

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Dytiscid? - Hydroporus striola Dytiscid? - Hydroporus striola
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Contributed by tom murray on 2 February, 2008 - 4:24pm
Last updated 28 January, 2009 - 6:59am

Moved
Moved from Hydroporus.
… tom murray, 28 January, 2009 - 6:59am login or register to post comments

H. striola
More or less fits habitus, size, colouration and range descriptions in keys with exception of male anterior protarsal claws which are said to have a "ventral flange that extends almost to apex"- hard to see in these images.
… Tim Loh, 28 January, 2009 - 12:42am login or register to post comments

Moved
Moved from Hygrotus.
… tom murray, 3 February, 2008 - 9:40pm login or register to post comments

I wonder
if Hygrotus spp. should have pubescent elytra? Looks like an Hydro*porus to me - but far from being an expert in water beetles . . .
… Boris Büche, 3 February, 2008 - 10:02am login or register to post comments

 
Epipleurae with basal carina
You may be correct, as Tom says, I just posted a Hygrotus sp. and was probably influenced. In our NAerm references (Am Beetles, and Downie and Arnett) they don't even mention presence or absence of pubescent elytra. They seem to go by the presence of basal carina on the Epipleurae. If you don't see any carina (check the lower (beetle's left) shoulder, just aft of the middle knee), then from our books this would definitely be Hydro*porus :)
… Tim Moyer, 3 February, 2008 - 8:06pm login or register to post comments

Thanks Tim
It's similar to the one you just posted.
… tom murray, 2 February, 2008 - 10:47pm login or register to post comments

yes, probably Hygrotus
based on Scutellum concealed, the shape of the hind coxal processes, and that I think I see the Epipleurae with basal excavation for receiving the middle knees and with a oblique carina. A fairly large genus, but perhaps someone can confirm and take it further.
… Tim Moyer, 2 February, 2008 - 10:31pm login or register to post comments

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