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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.

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Levwood has attached this picture to aid in identification. The message is below.
What is the genus and species and common name of this mayfly?
Levwood
Grosse Pte. Michigan

Posts: 11
Levwood on Jun 10, 2013June 10th, 2013, 3:16 pm EDT
Mayfly captured in the Black River, northern Michigan on June 7. Can anyone tell me the name of this bug? Thanks, Lev
levwood@earthlink.net
Lev
Oldredbarn
Oldredbarn's profile picture
Novi, MI

Posts: 2600
Oldredbarn on Jun 10, 2013June 10th, 2013, 6:02 pm EDT
Looks to me like a Leptophlebia...cupida or nebulosa...Though I've never seen the odd dark markings on the wing?

We call it the Borcher's Drake...Thought to be the model for Ernie Borcher's famous Au Sable fly.
"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
Entoman
Entoman's profile picture
Northern CA & ID

Posts: 2604
Entoman on Jun 10, 2013June 10th, 2013, 6:16 pm EDT
It looks like a male Isonychia tusculanensis imago, but they're not supposed to be in N. MI. Leptophlebia nebulosa looks very similar and does have the brown tipped wings as well. They have a terminal filament that I'm not seeing though. Even so, nebulosa is found in MI, so that would be my guess. Perhaps the middle tail was knocked off as these guys are always losing tails.
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
Levwood
Grosse Pte. Michigan

Posts: 11
Levwood on Jun 11, 2013June 11th, 2013, 3:53 pm EDT
Gentlemen, you guys are great. I do not have other photos, just this one. One of the tails did break off in my fingers. I'll go with the Leptophlebia since the folks at Gates Lodge did mention this off the cuff. If anyone else has a guess please weigh in but I think this case is solved! Thanks.

Lev
Lev
Entoman
Entoman's profile picture
Northern CA & ID

Posts: 2604
Entoman on Jun 12, 2013June 12th, 2013, 9:59 am EDT
One of the tails did break off in my fingers.

Nebulosa it is then, Lev.

The brown spot is likely from too much finger pressure on the wings with the hands. That often breaks the veins and lets the fluid out into the wings membrane.

Huh? Were'd you get this from, Mack...:)
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
Crepuscular
Crepuscular's profile picture
Boiling Springs, PA

Posts: 920
Crepuscular on Jun 12, 2013June 12th, 2013, 11:28 am EDT
The brown spot is likely from too much finger pressure on the wings with the hands. That often breaks the veins and lets the fluid out into the wings membrane.


What?
Taxon
Taxon's profile picture
Site Editor
Plano, TX

Posts: 1311
Taxon on Jun 12, 2013June 12th, 2013, 1:06 pm EDT
Hi Mack,

I too have observed a yellow liquid-appearing spot, usually in the tip of one fore wing, and have often wondered about it, although it never occurred to me that it might be the result of a mayfly having been captured by its wing tips.

However, in the case of Leptophlebia nebulosa , the brown staining on the outer 2/5 of their fore wings serve to distinguish them from other Leptophlebia species.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
Levwood
Grosse Pte. Michigan

Posts: 11
Levwood on Jun 13, 2013June 13th, 2013, 9:38 am EDT
You guys are awesome. I have a great shot of a large black Michigan stonefly you can take a shot at too. Want it?

Lev
Lev

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