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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Stoneflies (Plecoptera) » Perloidea » Common Stoneflies (Perlidae) » Acroneuriinae » Perlesta
Photo#321028
Stonefly - Perlesta
Copyright © 2009 tom murray

Stonefly - Perlesta
Groton, Middlesex County, Massachusetts, USA
July 25, 2009
Size: 13mm
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Contributed by tom murray on 16 August, 2009 - 4:45pm
Last updated 16 August, 2009 - 9:32pm

Moved
Moved from Vernal Stone.
… tom murray, 16 August, 2009 - 9:32pm login or register to post comments

*
(comment deleted)
… Lloyd Gonzales, 16 August, 2009 - 9:04pm login or register to post comments

Nope
this one is a Perlesta n.sp.! The pronotum will be paler on the drymo, and the wings not grayish.
… Donald S. Chandler, 16 August, 2009 - 9:01pm login or register to post comments

 
Does this look better?
It looks like there's only 2 ocelli on this one.
… tom murray, 16 August, 2009 - 9:37pm login or register to post comments

 
I don't think so, Tom
Perlinella usually has somewhat narrower wings, should have a few crossveins (at least one) between the 1st and 2nd anal veins, and usually has few, if any, costal crossveins before the area of the cord. If this specimen does have only two ocelli, it's more likely to be Neoperla. (I can't quite be sure about the number of ocelli, but the rear ocelli do seem to be fairly close together.)
… Lloyd Gonzales, 16 August, 2009 - 11:04pm login or register to post comments

 
I
will look at it again, but it did key reasonably well to Perlinella rather than Neoperla, and the subgenital plate was reasonably close to the figure in Stark's chapter on Perlidae. I wasn't 100% on my degree of happiness with the id though (the subgenital plate was sort of close but not spot on, which is a problem I have had with females of some other genera vs. the illustrations), and so will happily revisit it. Back to the book tonight, which is unfortunately at home where I do these identifications.
… Donald S. Chandler, 17 August, 2009 - 8:13am login or register to post comments

 
Thanks, Don
Looks like we saw this at about the same time. I was worried for a moment. :)
… Lloyd Gonzales, 16 August, 2009 - 9:06pm login or register to post comments

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