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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Dorsal view of a Ephemerella mucronata (Ephemerellidae) Mayfly Nymph from the Yakima River in Washington
This is an interesting one. Following the keys in Merritt R.W., Cummins, K.W., and Berg, M.B. (2019) and Jacobus et al. (2014), it keys clearly to Ephemerella. Jacobus et al provide a key to species, but some of the characteristics are tricky to interpret without illustrations. If I didn't make any mistakes, this one keys to Ephemerella mucronata, which has not previously been reported any closer to here than Montana and Alberta. The main character seems to fit well: "Abdominal terga with prominent, paired, subparallel, spiculate ridges." Several illustrations or descriptions of this holarctic species from the US and Europe seem to match, including the body length, tarsal claws and denticles, labial palp, and gill shapes. These sources include including Richard Allen's original description of this species in North America under the now-defunct name E. moffatae in Allen RK (1977) and the figures in this description of the species in Italy.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Lateral view of a Brachycentrus appalachia (Brachycentridae) (Apple Caddis) Caddisfly Adult from the West Branch of the Delaware River in New York
I captured this specimen in the same color as this photograph, during its egg-laying flight. The emergers are much lighter.
Taxon
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Plano, TX

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Taxon on Jul 15, 2007July 15th, 2007, 6:31 pm EDT
By the way, what, if anything, do you make of the stonefly species he describes in Nymphs as Acroneuria nigrita?

Gonzo-

Acroneuria nigrita is but one (of six) Acroneuria subordinate species name equivalents (synonyms for) Hesperoperla pacifica. Here is a gorgeous photo of one taken by an extremely talented Oregon photographer, Arlen Thomason.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
GONZO
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"Bear Swamp," PA

Posts: 1681
GONZO on Jul 15, 2007July 15th, 2007, 7:03 pm EDT
Thanks, Roger. I've never been able to track down that name. Now, however, I'm more puzzled than ever by both his illustration and parts of his text. The depiction and the mention of "Hatching on Northeast rivers occurs in late June" and his description of collecting/fishing it on the Henryville stretch of the Brodheads makes no sense for Hesperoperla pacifica. One puzzle replaces the other, I suppose.
Taxon
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Taxon on Jul 16, 2007July 16th, 2007, 2:20 am EDT
Gonzo-

I would be more comfortable having this discussion offline. I'll PM you later.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
Shawnny3
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Pleasant Gap, PA

Posts: 1197
Shawnny3 on Jul 16, 2007July 16th, 2007, 2:58 am EDT
Thank you, Gonzo, for that hyperbolic endorsement of my inchworm and fishing skills. Everyone ought to know the true story, though: Gonzo was the most gracious of hosts, calmly enduring my shortcomings for many hours and then focusing his commentary instead on the few minutes when everything clicked for me. Despite his occasional razzing of Louis and a few others on this board, Gonzo's a consummate gentleman, and he's also one heck of a flyfisherman (I won't say just how good he is, lest he get a big head about it). He showed me some beautiful water and did everything he could to help me get into the fish. I sincerely appreciate his hospitality.

I have another theory about the inchworm's effectiveness. I think the fish might have been so embarrassed by its presence in their esteemed water that they were just trying to clean it up before any other fish were subjected to it, like so many maids sweeping up dust bunnies. Or something like that. I know that, after seeing some of Gonzo's patterns, I was a little embarrassed to show it to him just before tying it on - thank goodness it caught a few fish.

-Shawn
Jewelry-Quality Artistic Salmon Flies, by Shawn Davis
www.davisflydesigns.com
GONZO
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"Bear Swamp," PA

Posts: 1681
GONZO on Jul 16, 2007July 16th, 2007, 5:18 am EDT
Geez, Shawn, thanks--I'm blushing. But I'm also wondering which one of us should be accused of employing hyperbole--I've looked at my post and can't find an ounce of it. It was great fun to meet you, and I'd happily share a stream with you, anytime, anywhere. (Except, perhaps, that tick-infested horror you inflicted upon your new bride on your honeymoon!) ;)

PS--Roger, fair enough. (Did I say something I shouldn't have? Again?)
Taxon
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Taxon on Jul 16, 2007July 16th, 2007, 7:14 am EDT
PS--Roger, fair enough. (Did I say something I shouldn't have? Again?)

No. It was just that, I am inclined to answer someone's question even when I don't know for sure, but have simply formed an opinion. And, in that vein, the answer to your question was going to get more speculative than I'm comfortable with doing on a public forum.

It it easy to forget that our comfortable little conversations, often involving only a few participants, are likely listened to by a much larger percentage of the registered users, and heaven only knows how many non-registered folks, assuming the forum is available to them for listening purposes only, which it may well not be. I simply don't know or can't remember.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
GONZO
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"Bear Swamp," PA

Posts: 1681
GONZO on Jul 16, 2007July 16th, 2007, 8:12 am EDT
As usual, Roger, I bow to your wisdom. And thanks for reminding me that I'm not just chatting with my pals here. I could probably benefit from that reminder on a regular basis, but by the time it registers, it's often too late. :)
Martinlf
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Martinlf on Jul 16, 2007July 16th, 2007, 5:42 pm EDT
Nice try Taxon, but your gracious offer will not save Gonzo from the style police.

--Two parentheticals both beginning with "and," and separated by another "and" clause? Now that's piling up the contractions. Tsk Tsk.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Shawnny3
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Pleasant Gap, PA

Posts: 1197
Shawnny3 on Jul 16, 2007July 16th, 2007, 6:35 pm EDT
I don't know, Louis - I think your reaching.

-Shawn
Jewelry-Quality Artistic Salmon Flies, by Shawn Davis
www.davisflydesigns.com
Martinlf
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Palmyra PA

Posts: 3047
Martinlf on Jul 17, 2007July 17th, 2007, 3:18 am EDT
Now that's ugly, Shawn, just plain ugly.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Shawnny3
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Pleasant Gap, PA

Posts: 1197
Shawnny3 on Jul 17, 2007July 17th, 2007, 3:41 am EDT
Sorry, couldn't resist. I thought that if we deflect your ire in enough directions, we might all escape with only flesh wounds.

-Shawn
Jewelry-Quality Artistic Salmon Flies, by Shawn Davis
www.davisflydesigns.com
Martinlf
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Palmyra PA

Posts: 3047
Martinlf on Jul 17, 2007July 17th, 2007, 4:10 am EDT
Oh, now I'm the aggressor. After all the abuse I've taken for my inability to get a fish in the net. I"m just trying to keep the discussion on grammar and spelling. Its that simpel.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Shawnny3
Moderator
Pleasant Gap, PA

Posts: 1197
Shawnny3 on Jul 17, 2007July 17th, 2007, 4:23 am EDT
You're right, Louis - you're the real victim here. The Man is keeping you down. You got to fight the powahs that be.

-Shawn
Jewelry-Quality Artistic Salmon Flies, by Shawn Davis
www.davisflydesigns.com

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