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.

Stream photos

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Neoleptophlebia Mayfly Nymph Neoleptophlebia Mayfly Nymph

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.

10 Recently Added Photos

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.

Mayfly Genus Teloganopsis (Little black Quills)

This genus contains a single species in the U.S., previously identified as Serratella deficians (Little Dark Olive). Teloganopsis deficians (Darth Vader Dun) can be important in the East where it's little dark (almost black) winged duns are hard to mistake for several other common dark ephemerellids.

This genus is unrepresented in the West.

Where & when

In 13 records from GBIF, adults of this genus have been collected during June (46%), July (23%), December (15%), February (8%), and August (8%).

In 19 records from GBIF, this genus has been collected at elevations ranging from 299 to 2559 ft, with an average (median) of 1982 ft.

Genus Range

source

Map of specific collection sites

Specimens of the Mayfly Genus Teloganopsis

1 Nymph

Teloganopsis deficiens (Little Black Quill) Mayfly Nymph

6 Pictures

Dorsal view of a Teloganopsis deficiens (Ephemerellidae) (Little Black Quill) Mayfly Nymph from the Bois Brule River in Wisconsin

This nymph has tiny, barely detectable tubercles on its abdominal segments, and I could not find the maxillary palpi. I tentatively guessed that it is Serratella deficiens back when that was a thing; the species is now known as Teloganopsis deficiens. One of the key characteristics, tarsal claws with a subapical denticle being larger than the preceding denticles, seems to be visible in some of the pictures.

Collected June 8, 2005 from the Bois Brule River in Wisconsin

Added by Troutnut on May 26, 2006

Collected June 8, 2005 from the Bois Brule River in Wisconsin and added by Troutnut on May 26, 2006