Troutnut.com Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

> > Epeorus

CrepuscularFebruary 23rd, 2013, 6:32 pm
Boiling Springs, PA

Posts: 923


and a pair

CrepuscularFebruary 25th, 2013, 1:52 pm
Boiling Springs, PA

Posts: 923
I don't think it's E. vitreus. I know you can't see it in the original photo but gill 1 is not right for E. vitreus. The anterior portion is elongated.



but i will defer to the experts. Another example of why making identifications from photos that do not show all the characters needed to make a positive identification is risky business.
EntomanFebruary 25th, 2013, 5:35 pm
Northern CA & ID

Posts: 2604
The head capsules can tell a lot sometimes. I was leaning towards E. pleuralis (Gordon Quill) and definitely felt it was at least in the species group. E. vitreus (Yellow Quill) is in a different group and its head is slightly conical at the anterior with the the corners less rounded. The lateral margins are less angled inward as well, so the eyes don't crowd the posterolateral margins or even overlap them as in the pleuralis group. It's also lacking the three bars anteriorly as is typical of vitreus but does show the indistinct V shaped mark of pleuralis.

The gill confirms the species group and also precludes fragilis (the other species in the group known for PA). It's the lack of a dark sclerotized strip running through it. I think it's safe to say it's pleuralis. Unless of course, I'm wrong.:)

Perhaps the best example of the heart shaped femoral marks I've seen on a nymph. Great shots and posing, Eric. I hope you don't get sick of hearing it because you will... A lot! It seems a little prepubescent bonding is going on there. Is it possible that Epeorus species arrange the marriages of their children?;)

"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
CrepuscularFebruary 25th, 2013, 6:14 pm
Boiling Springs, PA

Posts: 923
That's what I keyed it out to Kurt. Maybe just recently molted?
EntomanFebruary 25th, 2013, 6:49 pm
Northern CA & ID

Posts: 2604
Yep, that's what I think. It could be the substrate or possibly even the instar stage, I suppose. Perhaps even a little of all three.:) The one on the left sure is heavily maculated for an Epeorus. It also looks like it has eyes on the pronotum as well. How weird is that? Speaking of instars, what size are they? their proportions look like they have a way to go.

Live heptageniid photos sure are nice to work with... The dead ones usually drop their heads and make it a lot tougher. Again, great job.
"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
CrepuscularFebruary 25th, 2013, 8:07 pm
Boiling Springs, PA

Posts: 923
They both came from the same riffle t the same time. The lighter colored one is about 7.5 mm.

Quick Reply

You have to be logged in to post on the forum. It's this easy:
Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.

Related Discussions

TitleRepliesLast Reply
Re: Central Massachusetts
In the Identify This! Board by Shakeyfly
10Apr 28, 2009
by Shakeyfly
Up-to-date with the latest mayfly species
In General Discussion by Troutnut
0
Re: Thoughts on this Heptageniid's ID?
In Male Epeorus vitreus Mayfly Dun by Troutnut
1Oct 28, 2008
by GONZO
Re: Spinner ID?
In General Discussion by Martinlf
3Apr 29, 2007
by GONZO
Re: confusing local names+
In Ephemerella needhami Mayfly Dun by Gutcutter
4Dec 22, 2009
by Oldredbarn
Re: A mystery late-season Epeorus
In Male Epeorus frisoni Mayfly Dun by Troutnut
7May 9, 2012
by Entoman
Re: Peculiar Heptageniid
In Female Epeorus vitreus Mayfly Spinner by Troutnut
2Oct 5, 2006
by GONZO
Re: Epeorus sp. (longimanus?)
In the Identify This! Board by Millcreek
9Dec 14, 2014
by Entoman
Re: Please ID
In the Identify This! Board by FISHN50
5Aug 25, 2011
by Oldredbarn
Re: Not Maccaffertium, E. vitreus female
In Female Epeorus vitreus Mayfly Dun by GONZO
1Oct 19, 2006
by Troutnut
Most Recent Posts
Re: Where are the fishing stories? Rough weather conditions?
In General Discussion by Jmd123 (Troutnut replied)
Re: Hike in the Clearwater Mountains in the Alaska Range (Day 4 of 4)
In Site Updates by Troutnut
Re: Atigun float
In The Atigun River by Sci (Troutnut replied)
Re: Sheets Red Quill
In General Discussion by Brian314 (Jmd123 replied)
Re: Hendricksons
In Fishing Reports by Partsman (Jmd123 replied)
Re: New Troutnut version in the works
In Site Updates by Troutnut (Wiflyfisher replied)
Re: Scratching my head on the size here...
In Male Drunella doddsii Mayfly Dun by Jimspeaker (Taxon replied)
Re: SOMETHING'S biting, finally!
In the Photography Board by Jmd123 (Partsman replied)
Re: New rod opinions
In Gear Talk by Jt7 (Partsman replied)
Re: Mislabeled as Dun?
In Female Epeorus vitreus Mayfly Spinner by Jschoen (Troutnut replied)