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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.

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.

Minnesota's profile picture
Caledonia MN/LaCrosse WI

Posts: 35
Minnesota on Jan 18, 2007January 18th, 2007, 7:59 pm EST
I see that most of you are from the east coast. Has anyone ever fished in the SE corner of Minnesota, LaCrosse Wi area. I was just curious. If anyone had any need for information on the area, i'd be more than happy to help ya out.
Jason Moe

Posts: 62
Upnorth2 on Jan 18, 2007January 18th, 2007, 11:52 pm EST
Head to the Wisconsin Fly Fishing Page if I can post this here. Best forum for information like that.

Posts: 5
Brntrout on Feb 25, 2007February 25th, 2007, 11:34 am EST
Better yet go to http://www.mntu.org for real up to date info on fishing S.E.MN streams!
Rochester, Minnesota

Posts: 8
Pbaerman on May 4, 2007May 4th, 2007, 6:29 am EDT

I am new to this site and am a resident of Rochester MN, right in the heart of the SE Minnesota trout world. I am relatively new to the area and have fished, not a ton, sections of the White Water, Root (and its many branches, among other streams in the area. I am origionally from Michigan am trying to adjust to the new Fly Fishing Area. I would love to bounce some info back and forth. Hit me up any time.
Many men go fishing all of their lives without knowing that it is not fish they are after. ~Henry David Thoreau

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