Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana

Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Here Oksrukuyik Creek flows away from the Dalton Highway toward the pipeline. It eventually grows into one of the major rivers of the North Slope, and the main drainage to the west of the Sag, but where it crosses the road it's just a small grayling stream.

From Oksrukuyik Creek in Alaska

Stream photos

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Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Perlid identification assistance request

Tsali has attached these 3 pictures to aid in identification. The message is below.

Tsali
Posts: 4

Tsali on Jun 14, 2015June 14th, 2015, 7:59 pm EDT

Good evening,

I’m working on an identification for a Perlid and something that has me perplexed is the cross vein in the right forewing anal region but doesn’t exist in the left forewing? I’m sure it’s something I’m overlooking. Thanks in advance.

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Jun 15, 2015June 15th, 2015, 12:21 am EDT

Gary-

Cross veins are much less consistently located than longitudinal veins. As I recall, Dr. McCafferty shared that information with me well over a decade ago, and in response to a question very similar to yours. :-)

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Tsali
Posts: 4

Tsali on Jun 15, 2015June 15th, 2015, 4:11 am EDT

Thanks for the quick reply. If following Merritt and Cummins would you consider the forewings to have no crossveins then? If with one or more crossveins the couplet takes you to Hansonoperla or Perlinella but the diagnostics for these don't seem to fit.

Thanks.

Feathers5
Posts: 287

Feathers5 on Jun 15, 2015June 15th, 2015, 5:26 am EDT

That looks like a sulfur to me.

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Jun 15, 2015June 15th, 2015, 7:25 am EDT

Gary-

I would need some context in order to offer any help regarding genus level identification. In which state or province was this specimen collected, and on what date?

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Tsali
Posts: 4

Tsali on Jun 15, 2015June 15th, 2015, 4:28 pm EDT

Ignoring the cross vein I keyed this out as Acroneuria but I'm questioning this one for some reason. Body length is 25mm and wing length is 28mm. Specimen was collected in East Tennessee in the Hiwassee River in June. I've attached a couple of dorsal and ventral images to the original post.

Thanks.

Millcreek
Healdsburg, CA

Posts: 344

Millcreek on Jun 15, 2015June 15th, 2015, 5:53 pm EDT

Gary-

Looks like Acroneuria to me. Here are a couple of sites that show pictures.

http://bugguide.net/node/view/896136/bgimage

http://bugguide.net/node/view/60917/bgimage

"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein

Tsali
Posts: 4

Tsali on Jun 17, 2015June 17th, 2015, 4:44 am EDT

Mark - Thanks for the response.

Roger - Was that enough info? I suppose I should have provided better pics of the key diagnostic parts.

Thanks!

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Jun 17, 2015June 17th, 2015, 8:30 am EDT

Gary-

Roger - Was that enough info?

Sorry for the delay in responding. I also share your and Mark's belief that it's Acroneuria, for which the following species are present in Tennessee:

Acroneuria abnormis (Common Stone)
Acroneuria arida (Elegant Stone)
Acroneuria carolinensis (Carolina Stone)
Acroneuria covelli (no common name)
Acroneuria evoluta (Constricted Stone)
Acroneuria filicis (Illinois Stone)
Acroneuria frisoni (Central Stone)
Acroneuria lycorias (Boreal Stone)
Acroneuria perplexa (Enigmatic Stone)
Acroneuria petersi (Etowah Stone)

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Oldredbarn

Novi, MI

Posts: 2600

Oldredbarn on Jun 17, 2015June 17th, 2015, 9:50 am EDT

Acroneuria perplexa (Enigmatic Stone)

That is a great name for a bug! "perplexa".

Spence

"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively

"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood