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The Specimen

Cheumatopsyche (Little Sister Sedges) Caddisfly PupaCheumatopsyche (Little Sister Sedges) Caddisfly Pupa View 10 PicturesThis is the first fully formed caddis pupa (technically, a pharate adult (Pharate adult: Caddisflies are considered to be pupae during their transformation from larva into adult. This transformation is complete before they're ready to emerge. The emerging insect we imitate with the "pupa" patterns we tie is technically called a pharate adult. It is a fully-formed adult caddisfly with one extra layer of exoskeleton surrounding it and restricting its wings.)) that I've collected and photographed alive and healthy. I'll put a video of this specimen online soon, too.
Collected April 14, 2007 from Cayuta Creek in New York
Added to by on April 22, 2007

The Discussion

GONZOApril 23rd, 2007, 3:11 pm
Site Editor
"Bear Swamp," PA

Posts: 1681
This looks like a hydropsychid to me, but I'd be happy to have comments from the experts.
EarlfishmanApril 23rd, 2007, 6:56 pm
Posts: 17With abdominal gills like that, and the hook plates on ab. 3-5 it sure looks like a Hydropsychidae to me as well.
LitobranchaApril 24th, 2007, 5:42 am
Knoxville TN

Posts: 51
probably cheumatopsyche... in hydropsyche/ceratopsyche the hooks at the posterior end of the abdomen are longer on the outside (distal), this one looks longer medially a la cheumatopsyche.

jason did you get this critter to emerge from the pupal shuck?
GONZOApril 24th, 2007, 8:47 am
Site Editor
"Bear Swamp," PA

Posts: 1681
Earl--thanks for the confirmation.

Lito--I suspected that this might be Cheumatopsyche, but I had no key. Thanks for the information about one of the distinguishing characters. Size, emergence timing, and wing/body colors were the things that made me lean toward Cheumatopsyche.
TroutnutApril 24th, 2007, 9:16 am
Bellevue, WA

Posts: 2737
I tried to let it emerge, but no luck.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
EarlfishmanApril 24th, 2007, 6:42 pm
Posts: 17Lito,

Out of curiosity, do you have a reference for a key that takes Trichop pupae past family? That would be a handy thing to have access to.

CrenoDecember 22nd, 2007, 4:25 pm
Grants Pass, OR

Posts: 305
Earfishman - there is some information available for separating pupae to genus. Info for the hydropsychids is in Ross 1944.

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