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

> > Glossosoma intermedium or nigrior

This topic is about the Saddle-case Maker Genus Glossosoma

The sporadic emergence of these caddisflies diminishes the importance of the freshly emerged adults and pupae, but they have unique periods of vulnerability as larvae during the day and again as diving egg layers at dusk that can make them very important. A taxon can only have one common name attached in the title but this is one of those genera whose species come in a variety of colors and descriptive common names. In the West their bodies generally come in tan to brown shades with matching wings, their wings can be speckled grayish tan or even almost black as with an eastern species. Some western rivers have astounding populations. See Glossosomatidae for more information. Read more...

The Discussion

WiflyfisherJune 30th, 2020, 3:45 pm

Posts: 624
Caught and photographed in the Upper Midwest on May 12, 2020. I resized my original photo for the website.

John S.
TroutnutJuly 1st, 2020, 8:53 am
Bellevue, WA

Posts: 2592
Nice photo John!
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
WiflyfisherJuly 1st, 2020, 11:20 am

Posts: 624
Jason, thanks.

I sent my two best original macro photos to an entomologist friend who believes they are Glossosoma intermedium or nigrior, which are common here.

I bet you can guess the river too, :-)

I hope all is well with you and your family. BTW, I still email back and forth with Frank P. and the new fishery manager quite often.

Stay safe!

John S.
CrenoJuly 18th, 2020, 2:43 pm
Grants Pass, OR

Posts: 302
Did you keep this specimen? The palps and antennae look too robust to be Glossosoma. How about one of the brachycentrids?
WiflyfisherJuly 20th, 2020, 4:49 pm

Posts: 624
Did you keep this specimen? The palps and antennae look too robust to be Glossosoma. How about one of the brachycentrids?

Yes, I have the specimen or another one in a specimen bottle with 90% iso alcohol.

I emailed my original photo to a professor in Michigan. He has made a study of all the caddisflies in the Upper Midwest. He "guessed" by looking at my full size photo that it was Glossosoma, which are common in northern Wisconsin. I could send him my specimen but I never got around to it.

John S.
CrenoJuly 31st, 2020, 9:23 am
Grants Pass, OR

Posts: 302
I talked to Dave - send it to him, he is happy to look at it for you, and me :-)

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: Gender
In Female Hesperophylax designatus Caddisfly Adult by JpMcKenzie
1Dec 16, 2017
by Creno
Re: Here's two I could use some help with from East Tennessee!
(1 more)

In the Identify This! Board by BrettHRomer
6May 8, 2008
Re: Yellow stones........ ????
In the Identify This! Board by Quillgordon
10May 14, 2007
Ecdyonurus nymphs
In Ecdyonurus criddlei Mayfly Nymph by Jmw975
Re: Coffin Fly Spinner
In Male Ephemera simulans Mayfly Spinner by Jackson
6Jun 10, 2009
by Martinlf
Re: I.D. ing bugs
(2 more)

In the Identify This! Board by FISHN50
4Aug 26, 2011
by Creno
Re: January Caddis
In the Identify This! Board by DayTripper
17Jan 26, 2014
by Lastchance
Re: Anyone recognize this caddisfly?
In Apatania Caddisfly Adult by Troutnut
18Jul 31, 2011
by Entoman
Re: Acquired a bunch of goood hackle - anyone want some cheap?
In Fly Tying by TNEAL
4Mar 4, 2015
by Troutnut
Re: When you first approach a stream...
In General Discussion by GoofusBug
11Jan 15, 2009
by Trtklr
Most Recent Posts
Re: traditional streamers- still in use?
In General Discussion by Roguerat (Wiflyfisher replied)
Re: Boulder-hopping on the Middle Fork of the Snoqualmie
In Site Updates by Troutnut
Re: Fall ISO's - Au Sable
In General Discussion by Brian314 (Partsman replied)
Re: The white winged curse!
In General Discussion by Partsman (Brian314 replied)
Re: Ephemerella nymph
In Ephemerella aurivillii Mayfly Nymph by Millcreek (Troutnut replied)
Re: Need advice on fly line.
In Gear Talk by Montanafish (Red_green_h replied)
Re: Fly Fishing Rookie
In Gear Talk by Tor (Red_green_h replied)
Re: Timpanoga hecuba
In the Identify This! Board by Leskorcala
Re: Exploring up the Skykomish
In Site Updates by Troutnut (Martinlf replied)
Re: mean one thing, write another?
In Male Onocosmoecus unicolor Caddisfly Adult by Creno