East Wenatchee Caddis - Hydropsyche

Moved

… Arlo Pelegrin, 13 October, 2011 - 4:38pm

Hydropsyche

this is probably Hydropsyche cockerelli - to be sure a good pic of the 9th lobes would help. Otherwise those are great pics to get to species in this genus. The apices of the inferior appendages are nearly diagnostic for this species - your pic of these is good.

… Dave Ruiter, 11 October, 2011 - 10:35pm

9th lobes?

I'm looking at the abdomen now and can't seem to find ANY lobes. What kind of view do you want - dorsal, ventral, lateral?

… Arlo Pelegrin, 12 October, 2011 - 5:21pm

sorry

lateral is OK if the claspers (inferior appendages) are out of the way and they can be see from the side. If you cannot see them from the side you can twist the body slightly for an oblique view, or remove a clasper.
These dorsal lobes are two lobes that are at the dorsal apex of the abdomen. If my guess at H.cockerelli is correct these should be fairly short and directed dorsally at about 45 degrees from the body. They are usually blunt but can be more pointed in CA populations. If my guess is wrong they are probably directed downward.

… Dave Ruiter, 12 October, 2011 - 5:31pm

New image added

... a bit blurry, but if I am looking at the right lobes, they are directed upward.

… Arlo Pelegrin, 13 October, 2011 - 2:40pm

a bit blurry

is correct but I think you are right and they are angled up. It appears to be the form with the long lobes. I haven't spent enough time/analysis with the CA fauna to decide if that form is new but Pat Schefter looked at them in the 1980's and decided it was variation.

Do you take these photos with the specimen under a fluid? You can use ETOH, water, or glycerin with good results and I am sure there are other fluids. That should eliminate most of the glare and may give you a better resolution as a result.

If you want to be absolutely sure you will have to send the specimen to someone who can properly clear it and take a good look at all the parts to make sure the photos are not missing something. I am sure that Ian would like to look at it as he may not see alot of western material, if not I will.

… Dave Ruiter, 13 October, 2011 - 2:58pm

Those lobes definitely go "up"

and not "down." Specimen is pretty shabby because I had to take the wings off to see the bits and pieces. It WAS submerged in EtOH, but the details are so tiny it's difficult to get the camera to focus on the exact correct plane.
I'm currently unemployed and strapped for cash, so if you or Ian want me to send the specimen, I'll need a "grant." Or, I can drop it off to you next time I'm in Centennial (November, probably.)

… Arlo Pelegrin, 13 October, 2011 - 3:06pm

Grant

well - why don't you stop by in November, or whenever you are in town and we can talk about a "grant"

… Dave Ruiter, 13 October, 2011 - 4:24pm

New image added

... can we move it to species page?

… Arlo Pelegrin, 19 October, 2011 - 3:58pm

are you going to stop by?

lets wait til then - is there a hurry?

… Dave Ruiter, 19 October, 2011 - 4:14pm

No hurry -

but is it really possible it's something else?

… Arlo Pelegrin, 19 October, 2011 - 4:23pm

probably not

but there are lots of new species in CA yet to be described and that genus is not well known in the west.

… Dave Ruiter, 19 October, 2011 - 4:41pm

Strongly inclined to Hydropsy

Strongly inclined to Hydropsychinae, probably Cheumatopsyche. Do you still have the specimen?

… Ian Stocks, 11 October, 2011 - 3:18pm