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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.

Dorsal view of a Epeorus albertae (Heptageniidae) (Pink Lady) Mayfly Nymph from the East Fork Issaquah Creek in Washington
This specimen keys to the Epeorus albertae group of species. Of the five species in that group, the two known in Washington state are Epeorus albertae and Epeorus dulciana. Of the two, albertae has been collected in vastly more locations in Washington than dulciana, suggesting it is far more common. On that basis alone I'm tentatively putting this nymph in albertae, with the large caveat that there's no real information to rule out dulciana.
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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Stonefly Genus Perlesta (Golden Stones)

This is a large genus in the Acroneuriinae subfamily that currently contains 24 species. Distribution is primarily southern though a few species make it into the East and Midwest. Perlesta placida is reportedly a common species. Only a single western species of limited importance and distribution is known for the southern Rockies.

Where & when

In 194 records from GBIF, adults of this genus have mostly been collected during June (42%), July (27%), May (18%), and August (10%).

In 34 records from GBIF, this genus has been collected at elevations ranging from 420 to 11001 ft, with an average (median) of 4117 ft.

Genus Range


To determine whether a specimen of Perlidae belongs to Perlesta, use the Key to Genera of Perlidae Nymphs.

Specimens of the Stonefly Genus Perlesta

1 Female Adult

Discussions of Perlesta

Perlesta placida
14 replies
Posted by Mad4Trout on Jul 3, 2011 in the species Perlesta placida
Last reply on Nov 27, 2011 by Mad4Trout
I don't know why "Stoneflies of the United States" has such a limited range for Perlesta placida, but we (Madmen Chapter of TU) have collected them on the Mad River, Logan Co., OH. They were reported by Gaufin (1956, Ohio J. Sci. 56 (6):321-324) in numerous counties. They have been recorded more recently by Ohio EPA.

Start a Discussion of Perlesta

Stonefly Genus Perlesta (Golden Stones)

10 species (Perlesta bolukta, Perlesta dakota, Perlesta etneri, Perlesta frisoni, Perlesta fusca, Perlesta golconda, Perlesta nelsoni, Perlesta nitida, Perlesta shubuta, and Perlesta teaysia) aren't included.
Genus Range
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