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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
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.
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Artistic view of a Pteronarcys proteus (Pteronarcyidae) (Salmonfly) Stonefly Nymph from Mongaup Creek in New York
Site Editor
"Bear Swamp," PA

Posts: 1681
GONZO on Oct 4, 2006October 4th, 2006, 11:12 am EDT
Everything seems consistent with P. biloba, the "Knobbed Salmonfly." Unlike dorsata, it is usually found in small streams and headwaters where it is a real mouthful for the little trout. Typical salmonfly nymph ties tend to be likewise, so I usually choose to imitate the younger, smaller generations of nymphs.
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Bellevue, WA

Posts: 2758
Troutnut on Oct 4, 2006October 4th, 2006, 11:58 am EDT
Thanks. I've added a page for P. biloba with that information and changed the specimen's ID accordingly.

What's your source for the information? I still need to find a good source on stoneflies. I haven't tried hard yet since I've been focusing on mayflies, but it would be good to know where to start.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
Site Editor
"Bear Swamp," PA

Posts: 1681
GONZO on Oct 4, 2006October 4th, 2006, 1:02 pm EDT
Unfortunately, I'm not aware of a really good, up-to-date angler's book on stoneflies. The species I've identified today are ones I know well from personal experience.

I like Stoneflies for the Angler by Leiser and Boyle (Knopf, 1982 and Stackpole paperback reprint, 1990). It was accurate and well-researched for its day and is a good general angler's reference; but it lacks any systematic keys. There's also an Arbona stonefly book that I haven't seen or read.

And to answer your question from the other thread, I haven't come across a recent species level description of Epeorus that would be of any help.

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