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> > Isonichya Bicolor

This topic is about the Mayfly Family Isonychiidae

See Isonychia for details. It is the only North American genus in this family.

There are 17 more specimens...

The Discussion

CraigKMarch 26th, 2012, 4:35 pm
Bloomington In. 47403

Posts: 1
I think the Iso. b. female was referred to a generation or so ago as the white gloved howdy. I love those old names. Too bad there are no pics of Potamanthus (golden drake). They may be extinct (siltation and acid rain?)...talked with Charlie Meck about that a few years ago. A beautiful mayfly...an important hatch of years past. I couldn't find any ref. to Epherons. An important hatch for me in about any area of the country. This my first post...love the site...very nice photog. Lets see what the strange weather of the year does to the hatches and fishing for this year. Overall, I expect it can't be good. CK
PaulRobertsMarch 26th, 2012, 6:45 pm
Colorado

Posts: 1776
Don't think "Potamanthus" is extinct -except for the name. http://www.troutnut.com/topic/3534/yellowish-possibly-night-hatching-mayfly

Welcome!
TaxonMarch 26th, 2012, 7:05 pm
Site Editor
Plano, TX

Posts: 1294
Craig-

Congratulations on your first post. You will probably find it somewhat addictive.

Too bad there are no pics of Potamanthus (golden drake). They may be extinct (siltation and acid rain?)...talked with Charlie Meck about that a few years ago.


Quite a while ago, the genus name was changed from Potamanthus to Anthopotamus. Here is a beautiful photo of one taken July 3, 2008 by Charley Eisenman in Nashville, Tennessee:



Roger Rohrbeck
www.FlyfishingEntomology.com
OldredbarnMarch 26th, 2012, 11:36 pm
Novi, MI

Posts: 2591
Nice find there Roger! I have only run across it once, years back, near here (southeast Michigan) on a deep spring fed pond. (?) I love the "bars" cross-hatch markings on the wings...It reminds me a bit of a beautiful "Light Cahill" we get here in June that used to be called Stenonema heterotarsale(sp?)...

Spence
"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively

"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
PaulRobertsMarch 27th, 2012, 10:40 am
Colorado

Posts: 1776
THey come off the Barge Canal in NY pretty well. I have an image of one that emerged in my river tank which I operated in Ithaca NY. Don't remember where that individual nymph was collected, but it was likely Fall Creek.

Kurt got some clean up to do on this thread I would think. I don't think Iso's were mentioned.
KonchuMarch 27th, 2012, 10:59 am
Site Editor
Indiana

Posts: 496
one of my students just collected an Anthopotamus here in south central Indiana (quite ahead of schedule?), and I collected some last summer in SW Indiana, so the genus seems to be around, perhaps even thriving, here in the Hoosier state. i have zero doubt, though, that it has experienced local extinctions (extirpations) due to habitat changes, especially siltation in this region. there may be a number of extirpated species around Bloomington, including some ephemerellids and heptageniids, due to habitat alteration or loss.
CrepuscularMarch 27th, 2012, 12:54 pm
Boiling Springs, PA

Posts: 919
I have collected them on upper sections of the Yellow Breeches here in PA. But not many. I wonder if Gonzo has collected them there as well?
EntomanMarch 27th, 2012, 3:26 pm
Site Editor
Northern CA & ID

Posts: 2604
Craig -

Welcome to the forum!

Paul -

Kurt got some clean up to do on this thread I would think. I don't think Iso's were mentioned.


Yeah, I can't edit the title, because it's linked to a taxon. When these threads morph (as they often seem to do), it would be nice if the topic originators would perhaps modify the titles to recognize this... Craig? But even this won't de-link it from the improper taxon. This, and avoiding multiple ID requests in the same thread would be a big help. Unfortunately this happens a lot. There's a lot of great commentary by the bug guys on this forum buried in unrelated topics.
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
MartinlfMarch 27th, 2012, 8:28 pm
Moderator
Palmyra PA

Posts: 2907
Welcome Craig. While I worry about global warming, and do what I can in that regard, this year's warm weather and low water have led to the best dry fly fishing I've had for baetis in years.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
KonchuMarch 28th, 2012, 9:57 am
Site Editor
Indiana

Posts: 496
by the way, i think the picture is Anthopotamus distinctus
TaxonMarch 28th, 2012, 7:18 pm
Site Editor
Plano, TX

Posts: 1294
Hi Luke-

by the way, i think the picture is Anthopotamus distinctus


PM sent.
Roger Rohrbeck
www.FlyfishingEntomology.com
KonchuMarch 28th, 2012, 7:24 pm
Site Editor
Indiana

Posts: 496
PM returned!
KonchuMarch 28th, 2012, 7:25 pm
Site Editor
Indiana

Posts: 496
For all: Anthopotamus may or may not be my strength. :} We shall see.
EntomanMarch 28th, 2012, 9:01 pm
Site Editor
Northern CA & ID

Posts: 2604
Any idea as to how big he is?
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
TaxonMarch 28th, 2012, 9:22 pm
Site Editor
Plano, TX

Posts: 1294
Kurt-

Sure, the body length was reported to be 9 mm. However, I would suggest the thread be retitled by CraigK, as the Isonychia bicolor title is rather confusing.
Roger Rohrbeck
www.FlyfishingEntomology.com
EntomanMarch 28th, 2012, 10:22 pm
Site Editor
Northern CA & ID

Posts: 2604
Roger -

I would suggest the thread be retitled by CraigK, as the Isonychia bicolor title is rather confusing.

Yes, the only post I made to this thread (see above) asked him to do just that. It's a shame since this thread (once it falls off the board) will never be accessible by those who may want to look into the critters under discussion in the future. That's why I've tried to hold off commenting.... But I can't help myself.:)

As to the species, based on the body size and eyes as described in McCafferty's paper on the subject (discussing the verticis group of this genus), I think we are "neglecting" the right choice here.:)
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
EntomanMarch 28th, 2012, 10:29 pm
Site Editor
Northern CA & ID

Posts: 2604
On second thought - It's not gonna happen! When this thread has run its course (since we are committed now), I'm going to copy everything to a new topic in the proper genus and delete this one.
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
KonchuMarch 29th, 2012, 12:10 am
Site Editor
Indiana

Posts: 496
yes, neglectus is the elephant in the room; in a few days, I hope to consult my library and see what the original authors had in mind
EntomanMarch 29th, 2012, 12:45 am
Site Editor
Northern CA & ID

Posts: 2604
Luke & Roger-

Silly puns aside, what I'm working off of is pretty dated and the paper acknowledged there's a lot to work out with this genus. The nymphs hadn't even been associated yet with this species. Frankly, having never seen one before I'm just basing my opinion on a few obscure lines in a paper and Schwiebert's descriptions in his revised Nymphs. You two may be right (just a caveat for CYA). :) Look forward to what you find out.
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
KonchuMarch 29th, 2012, 8:51 am
Site Editor
Indiana

Posts: 496
it seems to me to have the body coloration (hard for me to tell on different computers), wing infuscation and maybe eyes of distinctus (very small vs. tiny in neglectus). the wing crossveins of distinctus are infuscated more than neglectus, and that seems to be the case here. but if it really is 9mm, then there's the chance it could be a larger version of neglectus, even though the wings point me more towards this being a small distinctus. however, there may be a little overlap of the upper size range of the one and the lower size range of the other, especially in the middle parts of the ranges (NY being north middle for the usually "larger" distinctus and almost southern for the "smaller" n. neglectus). if i was wrong with distinctus, it was based mostly on the wing infuscation characters. hard to say which ones are more or less reliable for IDs: size, body color, eyes, or wings. writing this somewhat on the fly (no pun intended), so I hope I didn't flop anything around.
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