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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.
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Mayfly Genus Cinygma (Western Light Cahills)

This uncommon Western genus is closely related to Cinygmula. It rarely provides good hatches.

Where & when

Time of year : April through September

In 9 records from GBIF, adults of this genus have been collected during August (44%), June (22%), April (22%), and July (11%).

In 1 record from GBIF, this genus has been collected at elevation of 7000 ft.

Genus Range

Hatching behavior

These mayflies emerge in the surface flim.

Nymph biology

Current speed: Slow

Specimens of the Mayfly Genus Cinygma

2 Male Spinners
1 Female Spinner
1 Nymph

Discussions of Cinygma

Cinygma mayflies
2 replies
Posted by Bnewell on Jul 15, 2011
Last reply on Jul 19, 2011 by Entoman
Perhaps one reason Cinygma mayflies do not create much interest for fishermen is because of their habit. They seem to prefer these small headwater streams, often streams without trout.

Start a Discussion of Cinygma

References

Mayfly Genus Cinygma (Western Light Cahills)

Genus Range
Common Name
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