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For Insects, Spiders & Their Kin
For the United States & Canada
Photo#534813
large Dytiscid larva - Dytiscus

large Dytiscid larva - Dytiscus
Groton, Middlesex County, Massachusetts, USA
June 24, 2011
Size: 27mm

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large Dytiscid larva - Dytiscus large Dytiscid larva - Dytiscus

Moved

 
Would this be identifiable if you had the specimen?

 
No :(
There are no published species keys for dytiscid larvae that I know of. Perhaps you can try rearing it?

 
I'll give it a shot
But I don't think it can't just be in a totally aquatic environment, since I believe it goes on land to pupate.

 
Yes...
they pupate on land, close to the water's edge, usually under cover or in soil. Try rearing them in a partially filled fish tank with a gradually sloping bottom and a dry platform of dirt and small stones.