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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Predaceous Diving Beetles (Dytiscidae) » Laccophilinae » Agabetes » Agabetes acuductus
Photo#265530
water beetle - Agabetes acuductus
Copyright © 2009 tom murray

water beetle - Agabetes acuductus
Groton, Middlesex County, Massachusetts, USA
April 12, 2009
Size: 7.5mm
Netted from a vernal pool.

Images of this individual: tag all
water beetle - Agabetes acuductus water beetle - Agabetes acuductus water beetle - Agabetes acuductus water beetle - Agabetes acuductus
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Contributed by tom murray on 12 April, 2009 - 7:15pm
Last updated 7 July, 2014 - 10:05am

Moved
Moved from Agabetinae.
… Tim Loh, 14 October, 2009 - 3:41am login or register to post comments

 
ID confirmed
from the specimen by Don Chandler.
… tom murray, 16 April, 2011 - 2:32pm login or register to post comments

Moved
Moved from Agabus.
… Tim Loh, 14 October, 2009 - 3:38am login or register to post comments

Moved
Moved from Beetles.
… tom murray, 12 April, 2009 - 8:20pm login or register to post comments

A female Agabus
large genus and mostly difficult to get further without examination of males; will have see whether the keys work for this one.
… Tim Loh, 12 April, 2009 - 8:03pm login or register to post comments

 
Best guess: Agabus aeruginosus species group
probably either A. aeruginosus or A. punctatus; both are quite similar in colour and appearance but A. aeruginosus would be slightly smaller than your specimen (max length= 7 mm). There is a 3rd species however (A. xyztrus), that has been recently described, which is very similar to A. aeruginosus but has a much more restricted range (New Jersey is the northernmost limit) and differs slightly in size, colour, and other technical characteristics.
I would probably go with A. punctatus based on the MCZ type specimen, though I'm still not 100% sure.
… Tim Loh, 13 April, 2009 - 1:11am login or register to post comments

 
I was thinking of leaving it
I was thinking of leaving it on the genus page for now, unless you think a group page should be made. The UNH site lists 12 species of Agabus in New England, and out of the 3 you mentioned, only punctatus is on the list.
… tom murray, 13 April, 2009 - 7:36am login or register to post comments

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