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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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Caddisfly Genus Macrostemum (Glossy Wing Sedges)

Macrostemum zebratum is by far the most important species in this genus.

These fast-water caddisflies are unusually elegant; they have shiny, dark metallic-colored bodies and goossy wings.

Where & when

In 130 records from GBIF, adults of this genus have mostly been collected during June (33%), July (28%), August (20%), and May (12%).

In 14 records from GBIF, this genus has been collected at elevations ranging from 59 to 12631 ft, with an average (median) of 512 ft.

Genus Range

Discussions of Macrostemum

Zebra Caddis
1 replies
Posted by Lastchance on Aug 4, 2008 in the species Macrostemum zebratum
Last reply on Aug 4, 2008 by Taxon
Is there a photo of one? I've never heard of them or perhaps I know them by a different name.

Start a Discussion of Macrostemum


  • LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.

Caddisfly Genus Macrostemum (Glossy Wing Sedges)

1 species (Macrostemum transversa) isn't included.
Genus Range
Common Name
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