The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
|Option 1||Option 2|
|Each mesonotal plate wider than long, shorter mesally than laterally (sf 19.278)||Mesonotal plates of varying width, but length nearly same mesally and laterally |
|Abdominal segment VIII with transverse posterodorsal line of slender, closely spaced setae (sf 19.275)||Abdominal segment VII with or without posterodorsal line of setae, but less dense than at left, if present (sf 19.306)|
|Case of short pieces of Sphagnum moss laid transversely (sf 19.341)|
|Remaining genera: Chilostigma, Chyranda, Clostoeca, Desmona, Ecclisocosmoecus, Grensia, Homophylax, Hydatophylax, Monophylax, Philocasca, Pseudostenophylax, Psychoglypha, and Pycnopsyche|
5 Example Specimens
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.
This specimen appears to be of the same species as this one collected in the same spot two months earlier. The identification of both is tentative. This one suffered some physical damage before being photographed, too, so the colors aren't totally natural. I was mostly photographing it to test out some new camera setting idea, which worked really well for a couple of closeups.
Species Phanocelia canadensis
No further information about this genus is available on Troutnut.com at this time.
|Go to Couplet 5|