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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.

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington
I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.
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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Dragonfly has attached this picture to aid in identification. The message is below.
Wiflyfisher
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Wisconsin

Posts: 622
Wiflyfisher on Mar 29, 2021March 29th, 2021, 12:05 am EDT
I collected this mayfly in Western North Carolina in May and I'm interested to find out the genus and/or species. I am thinking the family is Ephemerellidae. It is about 10mm long. Any ideas?

No, not Ephemerellidae, the sub-imago has only 2 tails.

My guess would be Epeorus genus.
Troutnut
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Administrator
Bellevue, WA

Posts: 2758
Troutnut on Mar 29, 2021March 29th, 2021, 6:55 pm EDT
The family is Heptageniidae. I agree with John that Epeorus is a good guess, but I'm not positive from a female dun.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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