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Calloway has attached this picture to aid in identification. The message is below.
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CallowayMarch 11th, 2009, 6:13 am
Asheville, NC

Posts: 5
Quill Gordon or March Brown
TaxonMarch 11th, 2009, 7:40 am
Site Editor
Plano, TX

Posts: 1306
Keith-

I would say neither. I believe the mayfly photo you posted to be of an Ameletus oregonensis male imago. Where and when was the photo taken?
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
CallowayMarch 11th, 2009, 7:41 am
Asheville, NC

Posts: 5
Upstate SC a few days ago
TaxonMarch 11th, 2009, 9:35 am
Site Editor
Plano, TX

Posts: 1306
Keith-

Well, in that case, it may another species of Ameletus, as I believe distribution of A. oregonensis is limited to the NW. The only Ameletus species I know of in SC is A. cryptostimulus, but unfortunately, I don't have access to a description of it, as it was first recognized in 1978, 43 years after publication of The Biology Of Mayflies, the text I most heavily rely on for mayfly species descriptions.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
TroutnutMarch 11th, 2009, 2:12 pm
Administrator
Bellevue, WA

Posts: 2558
None of the above. It's a "pseudo-gray drake," in the genus Siphloplecton. Compare with this one:

http://www.troutnut.com/specimen/253

I don't know how to tell the species apart. Siphloplecton basale seems to be the one most often mentioned in fly fishing books, but based on the distribution maps it seems some other species are more likely for your area.

The size and very early time of year match the Siphloplecton specimens I've collected.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
GONZOMarch 11th, 2009, 2:16 pm
Site Editor
"Bear Swamp," PA

Posts: 1681
Keith,

I believe this is Siphloplecton basale. Ameletus would have a sharper costal angulation on the hindwing. The dark areas in the bulla and the stigmatic regions of the forewing and the dark basal 1/3rd of the hindwing are characteristics of S. basale.
TroutnutMarch 11th, 2009, 2:20 pm
Administrator
Bellevue, WA

Posts: 2558
Ooh! I win by 4 minutes! ;)
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
TaxonMarch 11th, 2009, 4:10 pm
Site Editor
Plano, TX

Posts: 1306
Ah, and I stand corrected.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
TroutnutMarch 13th, 2009, 12:13 am
Administrator
Bellevue, WA

Posts: 2558
Calloway, did you have good fishing to this hatch? When I've seen them, their numbers are always too few to provide any action on their own. They overlapped with the Hendricksons sometimes, though.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
MartinlfMarch 13th, 2009, 2:32 pm
Moderator
Palmyra PA

Posts: 2977
OK, I see Gonzo is coming out of skiing exile. Glad to have you back on. Check your PM's.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell

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