Taxon, I am stunned and taken aback. It never occurred to me that you, of all people, would bring pornography to this innocent site. Epeorus pleuralis penises indeed! Shocking.
Maybe I should put one of those warnings upon entering the site, "You must be 18 years or older to enter. If you are a mayfly."
Konchu, have you got any good ideas for Epeorus
keys? I've had to resort to ancient books to identify adults, like Needham & Traver's "The Biology of Mayflies." If anyone can cite a more recent key to the adults I will happily rush to the entomology library and make a copy.
Since this topic seems to have everyone's attention, I'd like to point out another recent Epeorus discussion
in case anybody has fresh ideas about the identity of those four specimens.
As for the mayfly in this topic, I don't remember how exactly I identified it. It was a while ago and I was still busy finishing up at Cornell. I remember that it was one of several similar-looking and fairly large mayflies emerging from the Beaverkill mixed with blue quills (presumably Paraleptophlebia adoptiva
), and it was the time of year that everyone expected quill gordons so I think I just assumed that's what it was. It's too bad I didn't photograph this one next to a ruler, but it was quite large -- about the same size as the E. pleuralis
spinner on this site, and I do remember confidently keying that one under a microscope.
I'm still going to guess this one is E. pleuralis
based on the size, time of year, their known significance on that river, and Gonzo's observation that they can take on a yellowish color. Also remember that my lighting setup really brings out the colors, and most of my mayflies do look more drab in normal situations. But I do want to make it clear that this one hasn't been rigorously