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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.

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.
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.

Female Epeorus vitreus (Sulphur) Mayfly Spinner Pictures

Lateral view of a Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Mystery Creek #43 in New York
Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Mystery Creek #43 in New York
Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Mystery Creek #43 in New York
Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Mystery Creek #43 in New York
Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Mystery Creek #43 in New York
Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Mystery Creek #43 in New York
Ventral view of a Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Mystery Creek #43 in New York
Dorsal view of a Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Mystery Creek #43 in New York
Ruler view of a Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Mystery Creek #43 in New York The smallest ruler marks are 1 mm.

This mayfly was collected from Mystery Creek #43 in New York on September 19th, 2006 and added to Troutnut.com by Troutnut on October 4th, 2006.

Discussions of this Spinner

First Sighting
Posted by Martinlf on May 25, 2008
Last reply on May 25, 2008 by Martinlf
I saw my first E. vitreus spinner yesterday on a small spring creek in Blair County, PA. What a gorgeous bug! It was love at first sight. Thanks for the photo, Jason. I'm saving it in my fish porn folder.
Peculiar Heptageniid
2 replies
Posted by Troutnut on Oct 4, 2006
Last reply on Oct 5, 2006 by GONZO
Most of this relatively large spinner's features make me think Maccaffertium but the fore tarsal ratio and the upward slant of the basal costal crossveins seem to fit Epeorus. Any thoughts? I'm guessing it's a late-season vitreus.

Start a Discussion of Spinner

Female Epeorus vitreus (Sulphur) Mayfly Spinner Pictures

Collection details
Location: Mystery Creek #43, New York
Date: September 19th, 2006
Added to site: October 4th, 2006
Author: Troutnut
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