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> > ES2,Yellow ---- Ephemerella invaria / rotunda

Brookyman has attached these 9 pictures to aid in identification. The message is below.
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BrookymanMarch 31st, 2013, 9:49 pm
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ES2-Yellow. Light or dark hendrickson ???

On first glance I thought Ephemerella invaria. Only because of the red sacks on the top of the compound eyes. What are thoughts red eyelids called ?

Body is close to 8mm.

Where is Roger & gonzo at ???


Mack.
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BrookymanApril 4th, 2013, 5:28 pm
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Any thought's on this one.
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EntomanApril 4th, 2013, 6:29 pm
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Northern CA & ID

Posts: 2604
Hi Mack,

From the other topic.

Notice the dorsal tubercles? Excrucians doesn't have those. Neither does invaria. Both are also smaller as well. The exception is rotunda. It can be as large as subvaria (or even larger) and also has tubercles, but they are smaller and not sharp; like little nubs that can be hard to see. Remember that rotunda = invaria now. Ditto this info for your other submittals.

You must have missed the last sentence.
"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
BrookymanApril 4th, 2013, 9:42 pm
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Posts: 797
I wanted to pop it back up to see if anybody but us are talking
bugs. I wasn't truly sure about the rotund cause I am still
green on these critters.


I did read the last line I guess you could say I was fishing for conversation.

But I know I can always count on yours. When does gonzo join in ???


Mack.
Banned for threatening another user and then trying to circumvent a kinder "soft" ban with fake accounts
EntomanApril 4th, 2013, 9:45 pm
Site Editor
Northern CA & ID

Posts: 2604
I did read the last line I guess you could say I was fishing for conversation.

Oh, sorry about that!

Gonzo? If there's still snow on the ground back there he's busy ski instructing.
"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
BrookymanApril 5th, 2013, 12:26 am
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You know gonzo deleted himself from bug guide ???
I will file this one invaria rotunda.

THX Kurt.

Mack.

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EntomanApril 5th, 2013, 4:35 pm
Site Editor
Northern CA & ID

Posts: 2604
Mack -

I wouldn't. Again, those processes look pretty obvious and pointy to me, like little rose thorns. They'll get bigger as the nymph matures. My understanding is the little stubs on some forms of invaria (prev. known as rotunda) would be more difficult to make out at this stage of development and wouldn't look sharp.
"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
BrookymanApril 5th, 2013, 6:14 pm
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Posts: 797
I was thinking of it as rontunda but that patch from
4-6 should have jumpstarted my head to subvaria.

I just set up a 5 gallon tank and got allot of Ephemerella species.
Some stoneflies, caddis larva and a couple Mac's. When the water
settles I will start to photograph them. Many of the Ephemerella
have very dark wing pads not quite black. Its a little early for my
area.

BTW what are those red eyelid on the compound eyes mean
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EntomanApril 5th, 2013, 6:39 pm
Site Editor
Northern CA & ID

Posts: 2604
BTW what are those red eyelid on the compound eyes mean

I think I see what you are talking about but I haven't a clue. I can't tell for sure if that's part of the eye or chitin (cuticle material).
"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
BrookymanApril 5th, 2013, 9:29 pm
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Posts: 797
What I find interesting about them is they are on some species but
not others. They are not on subvaria but they are always on invaria.
At first I thought they were the orange developing eyes of the
soon to be adult male, but then they would be on all species.

They are in allot of the illustrations that I have seen. That was part
of the reason I was leaning to invaria rather than subvaria.
That is also part of the reason I put the head shot in on the post
thinking that it is a specie oriented thing. Maybe Luke can tell
us what they are all about. I think I will open that head tonight and
see if I can get some idea as to what they might be.

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

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