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> > Not Stenonema femoratum

The Specimen

The Discussion

DewaltJune 12th, 2013, 6:05 pm
Posts: 1Only Stenonema left in North America (after taxonomic revision) is S. femoratum. The underside of the abdomen has rows of roundish dark spots at the lateral margins. This one does not.
BrookymanJune 12th, 2013, 6:32 pm
Banned
Posts: 797
Dewalt I know that name. I see what you mean looking at the great photo Jeff has in Heptageniidae of the world Part 2. What Maccaffertium do you think it is ???

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Mack.
Banned for threatening another user and then trying to circumvent a kinder "soft" ban with fake accounts
EntomanJune 12th, 2013, 6:52 pm
Northern CA & ID

Posts: 2604
Hi Dewalt -

Welcome to the forum.

This specimen appears to have rounded gills as far as I can tell, and I'm sure Jason had it under a microscope for a better look than shows here. I wasn't aware that sternal maculation was diagnostic for this (now) monotypical genus. What is the source of your information?
"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
BrookymanJune 12th, 2013, 7:01 pm
Banned
Posts: 797
I agree Kurt I see them in the tergal up photo gill 5 and 6 on the right appear round to me too. Hold on a minute.

although the ventral maculation is weird for S femoratum.. Kurt take a peek at this photo blown up. The top set of gills do appear truncated in the anterior ones. One other thing interesting it looks as though the later projection are from 4 or (5 - 9) S femoratum listed as 2-9. Sorry according to (B&M) 1979 projections are 3-9 and the 9th is listed as. As long as the 8th projection or longer.

Of the cuff could this be a modestum or a mediopunctatum arwini ??? of some sorts.




Mack.
Banned for threatening another user and then trying to circumvent a kinder "soft" ban with fake accounts
EntomanJune 12th, 2013, 7:21 pm
Northern CA & ID

Posts: 2604
I'm seeing lateral projections on 2 - 9 and rounded gills. I suggest we hold off on speculative posts that will fill this topic up with unnecessary clutter, at least until we hear more from Dewalt on his rationale. I'd sure like him to be able to address the central issue without having to scroll up the topic too far to find it.
"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

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