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.

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Holocentropus Caddisfly Larva Holocentropus Caddisfly Larva

Dorsal view of a Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington

This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.

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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.

What is this insect??

Dirremeang
Koror, Palau

Posts: 3

Dirremeang on Apr 7, 2008April 7th, 2008, 8:36 pm EDT

Can anybody help me identyfy this aquatic insect please! I appreciate your help!

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Apr 7, 2008April 7th, 2008, 9:15 pm EDT

Zilah-

If you had acknowledged my response on your other post, I would have a bit more enthusiasm for attempting to identify your aquatic insect, for which you have neither provided a description nor posted a photo. If this response seems harsh, it's just because I put a lot of thought into the prior response for (seemingly) nothing.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com