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Mayfly - Serratella

Mayfly - Serratella
Groton, Middlesex County, Massachusetts, USA
June 7, 2009
Size: 6.5mm

guys, how about finding a consensus placement for this gal?
splitters or no splitters, the bug has the right to a proper burial.

Moved from Mayflies.

Does Don have this one?
A determination based on the female will be difficult, but it looks like Teloganopsis (deficiens) or Serratella (Ephemerellidae).

Oh no!!
"Teloganopsis" - don't tell me the splitters are not taking a break. I don't want to know. Beyond that, teeny Serratellas should be appearing now as larvae - I would be surprised to see adults out already, even if central MA is in a warmer temperature zone than NH. I will have to dig down into the accumulated adults before too long. It always takes me awhile before I can get the wing characters straight in my head.

Then I suppose...
I shouldn't mention that Ephemerella septentrionalis is now Penelomax septentrionalis (re: revision of Ephemerellinae by Jacobus and McCafferty, 2008). :)

We have been seeing T. (S.) deficiens on trout streams here in PA since the beginning of June, and I have encountered good numbers of them on the Beaverkill in the Catskills of NY in early June. McDunnough (1931) records them from Ontario and Quebec in June.

It has
been a very cold spring here, after our whopper of a 90 degree day in March plus a number of other surprisingly warm periods during the winter. I saw a few small Serratella last week, almost certainly deficiens. I do have the J&M paper - at least E. septentrionalis does look different from the other Ephemerella as a larva, though when you actually read the character analysis and discussion of the character states, I am not excited by the degree of difference.

While our species concepts reflect biological reality (we hope), and the relationships/phylogenetic tree can be produced as a hypothesis, assignment of Linnaean ranks (such as genus or subgenus) to this tree is subjective. As a subjective argument everyone has the option of accepting or rejecting the proposed ranking depending on how well supported or convincing the argument is for applying finer and finer levels of the genus category to the tree. In developing a consensus on the most acceptable classification, new categories (genera/subgenera here) shouldn't be accepted just because they have been proposed, but should be evaluated as to whether their recognition conveys the appropriate amount of data relative to biology and/or morphology of the group.

but as an interested amateur, the best I can do is to try to keep up with the proposed revisions and to try to understand which ones might be controversial and why.

Not yet
I'll be dropping off specimens from the last month to Don later this week.

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