Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

> > Pupal exuvia pics

Creno has attached these 2 pictures. The message is below.
View Full SizeView Full Size (2.2X larger)
View Full SizeView Full Size (2.2X larger)
CrenoAugust 1st, 2012, 11:33 pm
Grants Pass, OR

Posts: 304
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

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

Posts: 3078
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

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
Palmyra PA

Posts: 3078
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

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

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

Quick Reply

You have to be logged in to post on the forum. It's this easy:
Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.

Related Discussions

TitleRepliesLast Reply
Re: Caddis query
In Fly Tying by Roguerat
3May 18, 2020
by Wbranch
Re: rhyacophila/green sedge
In General Discussion by Goose
1Sep 13, 2006
by Troutnut
Re: Limnephilidae?
In the Identify This! Board by Jbrw
2Jun 26, 2007
by Jbrw
Re: Schlappen - Preferred Brand?
In Fly Tying by Kschaefer3
9Aug 23, 2013
by Kschaefer3
Re: Pupa color?
In the Caddisfly Genus Chimarra by Frankcoz
6Apr 5, 2012
by Entoman
Re: A video, only the brave should watch.
In General Discussion by JAD
9Apr 21, 2010
by Michael123
Re: LaFontaine Emergent Pupa
In Fly Tying by Wbranch
12Feb 2, 2010
by Softhackle
Re: Pretty float down the Yakima Canyon
In Site Updates by Troutnut
9Mar 6, 2020
by Martinlf
Re: Caddis Pupae Question
In the Insect Order Trichoptera by PaulRoberts
40Nov 23, 2015
by Martinlf
Re: Hydropsychid?
In Hydropsyche Caddisfly Pupa by GONZO
14May 7, 2009
by LittleJ
Most Recent Posts
Re: Fish & Camp Destination
In General Discussion by Ste6168 (Martinlf replied)
Re: What do I have, what do I need?
In Fly Tying by Red_green_h (Creno replied)
Re: 2015 Caribou Hunt
In Site Updates by Troutnut (Kvnfraley replied)
Re: I got the scope Jason recommended and here are some pics through it!
In the Photography Board by Jmd123 (Creno replied)
Re: Tippet for Doug
In Gear Talk by Martinlf (Red_green_h replied)
How to tie Devil Bug
In Fly Tying by Coha
Re: Best Streamer Rod
In Gear Talk by Dschmaier (Partsman replied)
Re: Happy Thanksgiving
In General Discussion by Martinlf (Partsman replied)
Re: Fall ISO's - Au Sable
In General Discussion by Brian314
Partridge & Orange spider by Barry Ord Clarke
In Fly Tying by Coha