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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Lateral view of a Onocosmoecus (Limnephilidae) (Great Late-Summer Sedge) Caddisfly Larva from the Yakima River in Washington
This specimen keys pretty easily to Onocosmoecus, and it closely resembles a specimen from Alaska which caddis expert Dave Ruiter recognized as this genus. As with that specimen, the only species in the genus documented in this area is Onocosmoecus unicolor, but Dave suggested for that specimen that there might be multiple not-yet-distinguished species under the unicolor umbrella and it would be best to stick with the genus-level ID. I'm doing the same for this one.
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 Species Psychoglypha alascensis (Snow Sedges)

Where & when

Time of year : Winter to spring

This species is widespread in the West.

In 32 records from GBIF, adults of this species have mostly been collected during October (22%), September (22%), November (19%), August (13%), March (9%), and December (6%).

In 10 records from GBIF, this species has been collected at elevations ranging from 34 to 6972 ft, with an average (median) of 502 ft.

Species Range

Specimens of the Caddisfly Species Psychoglypha alascensis

1 Female Adult

Start a Discussion of Psychoglypha alascensis

References

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

Caddisfly Species Psychoglypha alascensis (Snow Sedges)

Taxonomy
Species Range
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