Troutnut Forum > Specimen Discussion > ID on this little olive?
The Specimen
Attenella margarita (Little Western Blue-Winged Olive) Mayfly Dun
View 6 PicturesI found this dun unusually late in the year for anything in the Ephemerellidae family in the East. It's also small for that family.
View 6 PicturesI found this dun unusually late in the year for anything in the Ephemerellidae family in the East. It's also small for that family.Region: Catskills
Collected Sep 4, 2006
Added Oct 3, 2006
The Discussion
| Troutnut | October 3rd, 2006, 10:15 pm | |
| Fairbanks, AK Posts: 1115 | My Ephemerellidae keys are pretty much garbage when it comes to identifying female duns. I'm wondering if anybody has any insight on this one based on personal experience. There can't be all that many tiny olive Ephemerellids hatching in September. My tentative guess would be Serratella. | |
| Jason Neuswanger The Troutnut | ||
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| Taxon | October 4th, 2006, 1:41 am | |
| Mercer Island, WA Posts: 484 | Jason- I'm reasonably confident that it's Attenella margarita. | |
| Roger Rohrbeck www.FlyfishingEntomology.com | ||
| Troutnut | October 4th, 2006, 1:08 pm | |
| Fairbanks, AK Posts: 1115 | OK, I'll move it there for now. What makes you sure? I looked through all the scientific papers I have on the likely species again and can't find anything useful. I really wish they described the females and the duns more often. | |
| Jason Neuswanger The Troutnut | ||
| Taxon | October 4th, 2006, 4:23 pm | |
| Mercer Island, WA Posts: 484 | Jason- Take a look at Fauceglia p. 67. It’s the best photo I’ve found of a Attenella female dun. Incidentally, I hadn’t yet discovered that photo when I offered the earlier opinion, but that reinforced my opinion. In any event, there are a number of factors, which taken together, convinced me: - dorsal pointed finger-like meso-thoractic projection - hind wing costal projection - body coloration - size - early Sep. emergence - presence in NY | |
| Roger Rohrbeck www.FlyfishingEntomology.com | ||
| GONZO | October 4th, 2006, 5:20 pm | |
| "Bear Swamp," PA Posts: 876 | Roger- Thank you. I was wandering about that "finger-like" projection. It is so distinctive, but I haven't found reference to it anywhere. If this is an Attenella trait, then you've finally confirmed my longstanding suspicion that the picture of the attenuata dun in my copy of Hatches (the 1975 original) is really a Drunella dun. (The thick front femurs and the fact that attenuata is a wickedly overrated hatch always made me question it.) | |
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