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Creno has attached these 2 pictures. The message is below.
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CrenoAugust 1st, 2012, 11:33 pm
Grants Pass, OR

Posts: 305
Here are a couple pics of a caddis pharate adult separated, but within, the pupal skin. The pupae was removed from the closed pupal case. In the photo of the abdomen you can see the wing pad and it is not completely darkened so this "pupae" was not quite ready to leave the case yet.
PaulRobertsAugust 2nd, 2012, 10:30 am
Colorado

Posts: 1776
Thanks for posting these.
MartinlfAugust 2nd, 2012, 11:31 am
Moderator
Palmyra PA

Posts: 3192
Cool. This somewhat confirms the ideas behind the LaFontaine caddis and similar halo patterns.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
PaulRobertsAugust 2nd, 2012, 12:35 pm
Colorado

Posts: 1776
Cool. This somewhat confirms the ideas behind the LaFontaine caddis and similar halo patterns.

I'm not convinced of that -yet.
MartinlfAugust 2nd, 2012, 1:16 pm
Moderator
Palmyra PA

Posts: 3192
somewhat? :)
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
EntomanAugust 2nd, 2012, 3:04 pm
Northern CA & ID

Posts: 2604
I think the difference may be just semantics. When LaFontaine discusses the "bubble" look, he is clearly referring to the reflective or translucent character of the separated cuticle. Use of the word does open up the possibility for misinterpretation as a gas bubble encased in water pressure is undoubtedly more reflective than either gas or molting fluid encased in a cuticle. If memory serves, these subtleties are not addressed in his writings, and it certainly doesn't help by attaching adjectives like "bright" and "shiny", either.:) What is undeniable is that there is a big difference between the look of a diving egg layer and an ascending pupa in terms of brightness. Personally, I wouldn't describe a pupa as looking like a bright or shiny bubble.
"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
PaulRobertsAugust 4th, 2012, 11:14 am
Colorado

Posts: 1776
If you look at pharate pupae (look at all the images you can find) you'll see that the largest amount of excess skin is around the abdomen, and at at the very tip is a bag of skin. If a gas was forced into this skin, wouldn't the insect buoy up abdomen first? There is comparatively little loose skin up front. And the abdomen, where the rete (gills in larvae/spiracules in adults) is located, would seem to be the most likely place for gas production.
PaulRobertsAugust 5th, 2012, 11:47 am
Colorado

Posts: 1776
Gills appear to be intact -Not dessicated.

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