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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.

Case view of a Pycnopsyche guttifera (Limnephilidae) (Great Autumn Brown Sedge) Caddisfly Larva from the Yakima River in Washington
It's only barely visible in one of my pictures, but I confirmed under the microscope that this one has a prosternal horn and the antennae are mid-way between the eyes and front of the head capsule.

I'm calling this one Pycnopsyche, but it's a bit perplexing. It seems to key definitively to at least Couplet 8 of the Key to Genera of Limnephilidae Larvae. That narrows it down to three genera, and the case seems wrong for the other two. The case looks right for Pycnopsyche, and it fits one of the key characteristics: "Abdominal sternum II without chloride epithelium and abdominal segment IX with only single seta on each side of dorsal sclerite." However, the characteristic "metanotal sa1 sclerites not fused, although often contiguous" does not seem to fit well. Those sclerites sure look fused to me, although I can make out a thin groove in the touching halves in the anterior half under the microscope. Perhaps this is a regional variation.

The only species of Pycnopsyche documented in Washington state is Pycnopsyche guttifera, and the colors and markings around the head of this specimen seem to match very well a specimen of that species from Massachusetts on Bugguide. So I am placing it in that species for now.

Whatever species this is, I photographed another specimen of seemingly the same species from the same spot a couple months later.
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.
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Isidro
Posts: 24
Isidro on May 4, 2008May 4th, 2008, 3:04 am EDT
Maybe stone flies will be more successful than the mayflies. I tried to find a key for European families of Plecoptera but I don't have found it. This one was photographed yesterday at Bádenas, Teruel, Aragon, NE Spain at 850 meters high, in a point of permanent quiet water very dirty and full of aquatic grasses and hedges (Typha, Scirpus etc), with lime soil and surrounded by cultivated fields. The stone fly sizes about 17 mm long (including wings, not including antennae), and have not cerci. I have the collected expemplar for see the venation or all these characters that you can need for helps me with the identification.

Here are a list of all Iberian Peninsula stoneflies.

http://www.fauna-iberica.mncn.csic.es/faunaib/arthropoda/insecta/plecoptera/index.php

And here is the bug.



Thanks in advance.
Isidro
Isidro
Posts: 24
Isidro on May 8, 2008May 8th, 2008, 11:52 am EDT
What a great success!!!

Well, looking in a book I see the venation very, very similar to Nemoura. I thinks that family Nemouridae is sure, then. But there are many, many (too many) species... so, it's impossible, only would be identified by distribution maybe...

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