Header image
Enter a name
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.

Dorsal view of a Grammotaulius betteni (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This is a striking caddis larva with an interesting color pattern on the head. Here are some characteristics I was able to see under the microscope, but could not easily expose for a picture:
- The prosternal horn is present.
- The mandible is clearly toothed, not formed into a uniform scraper blade.
- The seems to be only 2 major setae on the ventral edge of the hind femur.
- Chloride epithelia seem to be absent from the dorsal side of any abdominal segments.
Based on these characteristics and the ones more easily visible from the pictures, this seems to be Grammotaulius. The key's description of the case is spot-on: "Case cylindrical, made of longitudinally arranged sedge or similar leaves," as is the description of the markings on the head, "Dorsum of head light brownish yellow with numerous discrete, small, dark spots." The spot pattern on the head is a very good match to figure 19.312 of Merritt R.W., Cummins, K.W., and Berg, M.B. (2019). The species ID is based on Grammotaulius betteni being the only species of this genus known in Washington state.
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.

Adirman's profile picture
Monticello, NY

Posts: 479
Adirman on Jun 21, 2011June 21st, 2011, 4:58 pm EDT
I bought the James Marsh DVD on Mayflies as advertised on Troutnut. Cost $34.95 w/ shipping and got w/in about 7-8 days, not bad. The DVD sound quality was a little weak at times but not bad; overall it was very informative though! The host, James Marsh, takes you through all of the major Mayflies w/ upclose shots, Latin names, and common name. Overall, I'd give it about a B. Solid stuff and defintely worth getting but could be a tad better in terms of sound quality and maybe providing a scenario where he (James) himself actually fishes and exhibits his thought processes from initial arrival on-stream to actually successfully catching trout. Still though, solid and recommended!!

Quick Reply

Related Discussions

Last Reply
Nov 5, 2013
by Stokes
Mar 13, 2008
by Wbranch
Mar 26, 2009
by RleeP
Oct 3, 2015
Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy