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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Predaceous Diving Beetles (Dytiscidae) » Hydroporinae » Hygrotini » Hygrotus » Hygrotus sayi
Photo#49774
Predacious Diving Beetle - Hygrotus sayi
Copyright © 2006 tom murray

Predacious Diving Beetle - Hygrotus sayi
Assabet River NWR, Middlesex County, Massachusetts, USA
April 27, 2006
Size: 3.2mm

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Predacious Diving Beetle - Hygrotus sayi Predacious Diving Beetle - Hygrotus sayi
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Contributed by tom murray on 27 April, 2006 - 10:54pm
Last updated 30 April, 2006 - 7:31pm

Dytiscidae: Hygrotus sayi
I noticed the size, and a red flag went up. Desmopachria is in the neighborhood of 1.8-2.0 mm, and at the monstrous size of 3.2 mm it must be Hygrotus sayi (and checked in the collection this afternoon). For some reason the two taxa look alike to me, except for size. A bit more brightly orange than normal for that species also.
… Donald S. Chandler, 30 April, 2006 - 6:36pm login or register to post comments

 
Moved
Now I'll have to pay attention to the tiny ones, and see if the smaller version shows up.
… tom murray, 30 April, 2006 - 7:38pm login or register to post comments

Dytiscidae: Desmopachria convexa
I think this is correct - a bit more reddish/orangish than normal, possibly due to the lighting.
… Donald S. Chandler, 29 April, 2006 - 4:06pm login or register to post comments

 
Flash
I'm sure the flash lightened it up a bit more than normal. I didn't darken the image in photoshop, because it looked like more detail showed this way.
… tom murray, 29 April, 2006 - 7:12pm login or register to post comments

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