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> > Epeorus pleuralis

Brookyman has attached these 15 pictures to aid in identification. The message is below.
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A side view of the 7th segment & the 7th gill. The projection is actually a shield of sorts
A side view of the 7th segment & the 7th gill. The projection is actually a shield of sorts
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NEW and more correct head capsule
NEW and more correct head capsule
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A bottom view of the 7th segment & the 7th gill. How it enters the segment
A bottom view of the 7th segment & the 7th gill. How it enters the segment
BrookymanMarch 22nd, 2013, 9:27 pm
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Posts: 797
Looks like 9 mm. This is a Epeorus pleuralis or quill Gordon

Sorry about the photos I haven't had a chance till now to try the
lighting out. There is a brown setae stripe from segment 1-8 ? which
I would presume is what Edmunds & Allen are talking about as a brown
stripe. Gills # 1 do go under a tad I marked a photo to show that.

The maculation in the head capsule is very hard to read I made a
head capsule illustration + one for gill # 1.

I could not get a photo of the slide with the forefemora notch
and will try again tomorrow.

I wish there were manuals that really cover these guys that would
make life grand :)


Mack.
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BrookymanMarch 22nd, 2013, 9:55 pm
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Now I wonder if this is suffusus that Jeff mentioned in his 2006
Epeorus manual. ??? What do you guys think ???
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EntomanMarch 22nd, 2013, 10:53 pm
Site Editor
Northern CA & ID

Posts: 2604
That's a pleuralis group gill. The large size, dark paired dorsal spots on the terga and the indistinct "V" on the head capsule's anterior point to pleuralis (Gordon Quill).

Suffusus is in the vitreus group. They have heart shaped 1st gills.
"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
BrookymanMarch 22nd, 2013, 11:01 pm
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So I will label this guy as pleuralis for now that makes the most
sense. I don't see that setae stripe on any other species what do you make
of that. have you seen that before ??? I'm still green on ep's.



Thanks Kurt


Mack.
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EntomanMarch 22nd, 2013, 11:32 pm
Site Editor
Northern CA & ID

Posts: 2604
Yes, it is a common feature on these critters.
"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
BrookymanMarch 22nd, 2013, 11:37 pm
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Thank you.
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EntomanMarch 22nd, 2013, 11:42 pm
Site Editor
Northern CA & ID

Posts: 2604
My pleasure, Mack.

The maculation in the head capsule is very hard to read I made a
head capsule illustration

Yeah, a high percentage of back light (even in dark photos) sometimes makes it difficult to make out dorsal maculation as other stuff underneath bleeds into it. BTW - I don't see the bowling pin on the anterior you illustrated. Looks more like an indistinct V to me in the photo.
"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
BrookymanMarch 23rd, 2013, 3:55 pm
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Posts: 797
The illustration was made on a sample I had mounted the day before. So I now believe looking back that as I mounted the head capsule the center area would have most likely compress from the flattening of the elliptical vertex. So I think that is why I didn't see that typical V ish shape on the frontale shelf. So today before I empty the head capsule on this one I will cut his head off and lay it flat under the microscope. Then I will adjust the illustration based on both.

Mack.
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EntomanMarch 23rd, 2013, 4:13 pm
Site Editor
Northern CA & ID

Posts: 2604
Well, they are very good. I'm glad that they are adjustable. Is there a reason why you illustrated the gill upside down? Some may be confused by that.
"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
BrookymanMarch 23rd, 2013, 4:27 pm
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Posts: 797
I did the illustration on the slide mounted sample not knowing that it was upside down. I will trace a copy and flip it.

Thanks Kurt

Mack.
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BrookymanMarch 25th, 2013, 1:55 am
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Posts: 797
I added a new illustration of the head capsule. I am happier with
the maculation markings now.
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LastchanceMarch 25th, 2013, 5:20 pm
Portage, PA

Posts: 437
You guys really have some great photo set-ups.
BrookymanMarch 25th, 2013, 7:01 pm
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Posts: 797
Thanks Bruce

Hey Kurt I added 2 illustrations of the gill in place, Doing the first gill
like that was super hard so I opted to do the 7th that was a little easier
to do.

These illustrations show how the gills enter & attach to the segment. Funny the lateral view shows that the projection is in fact a type of shield and not a spine as I thought it was. Looking at the ventral view it looks like a sharp spine. In this view we can see how the gill is inserted behind the shield and then connected to the trachea tube. The fibrils or "fluffy gill" are pointing toward the top of the abdomen.



Mack.
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OldredbarnMarch 26th, 2013, 11:51 am
Novi, MI

Posts: 2589
Mack & Eric...You two have these things coming at us fast and furious...Do we get a diploma in entomology at the end of all of it...Between your pics and the "Bug Boys" filling in the blanks we should! :)

Nice stuff there Mack!

Spence

I love the debates we have here over species...I just hope no one from "the outside" ever listens in...:) It reminds me of a story a friend told me from a trip he took to Montana years back...I think the restaurant/bar was called something like the Grizzly Bar & Grill, between West Yellowstone and Ennis...He and a couple anglers were sitting at a table mauling their steaks and talking bugs in latin etc...After a while some folks got up to leave from another table and a guy stopped by theirs and said, "I'm not sure what you boys have been talking about for the last hour, but I'm sure its interesting none-the-less."
"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
BrookymanMarch 26th, 2013, 2:17 pm
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Posts: 797
Hey Spence

Love the comments. This spring should be the year of bug photos. I know Eric
will likely load a mass amount too. Well we will keep Kurt jumping :)


Mack.
Banned for threatening another user and then trying to circumvent a kinder "soft" ban with fake accounts

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