Header image
Enter a name
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.

Dorsal view of a Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the Yakima River in Washington
Some characteristics from the microscope images for the tentative species id: The postero-lateral projections are found only on segment 9, not segment 8. Based on the key in Jacobus et al. (2014), it appears to key to Neoleptophlebia adoptiva or Neoleptophlebia heteronea, same as this specimen with pretty different abdominal markings. However, distinguishing between those calls for comparing the lengths of the second and third segment of the labial palp, and this one (like the other one) only seems to have two segments. So I'm stuck on them both. It's likely that the fact that they're immature nymphs stymies identification in some important way.
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.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Caddisfly Family Lepidostomatidae (Little Brown Sedges)

See Lepidostoma for details. It's the only important genus in this family.

The other one, Theliopsyche, is an uncommon Eastern small stream genus.

Where & when

In 563 records from GBIF, adults of this family have mostly been collected during July (26%), August (23%), June (23%), May (11%), and September (9%).

In 214 records from GBIF, this family has been collected at elevations ranging from 7 to 19701 ft, with an average (median) of 4304 ft.

Family Range

Specimens of the Caddisfly Family Lepidostomatidae

3 Male Adults
2 Female Adults
5 Larvae

Start a Discussion of Lepidostomatidae

References

Caddisfly Family Lepidostomatidae (Little Brown Sedges)

Taxonomy
Genus in Lepidostomatidae: Lepidostoma, Theliopsyche
Family Range
Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy