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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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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Orvisman
Posts: 1
Posts: 1
Orvisman on Aug 23, 2018August 23rd, 2018, 7:20 pm EDT
I found this spinner near my work at a wastewater treatment plant. It's about 1km from a fairly slow large river. It’s body is about 13mm in length, and looks to be from the family heptageniidae. Is it from the genus heptagenia? Picture was taken close to Edmonton Alberta Canada.
Thank you
Thank you
Martinlf on Aug 26, 2018August 26th, 2018, 1:22 am EDT
Thanks for posting. I wish I knew enough to say, but one of our bug experts should eventually get around to taking a look. Heptagenia seems like a likely genus to me, anyway: two tails, dark veins in the wings. Good photo, with plenty of detail!
"He spread them a yard and a half. 'And every one that got away is this big.'"
--Fred Chappell
--Fred Chappell