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Caddisfly Family Glossosomatidae (Saddle-case Makers)

Taxonomic Navigation -?-
» Family Glossosomatidae (Saddle-case Makers)
Genus in GlossosomatidaeNumber of SpecimensNumber of Pictures
Agapetus00
GlossosomaLittle Brown Short-horned Sedges211
ProtoptilaPseudo-Microcaddisflies00

3 genera aren't included.
Common Name
MatchCommon Name
****Saddle-case Makers
Pictures Below ↓
This family is one of the primitive caddisflies of the Rhyacophiloidea superfamily. However, they are not free-living like their better known cousins the Rhyacophilidae (Green Rockworm). Instead they build rounded "turtle" shaped cases that do not surround the larvae but are rather attached to the rock surface at their margins. Underneath is a sling made of secretions upon which the larvae ride, hence the common name Saddle-case Makers. There are four genera of possible interest but only one is generally recognized as important to anglers. See Glossosoma (Little Brown Short-horned Caddis) for details. The other three are so tiny that they are also called Pseudo-microcaddis.

Protoptila (Tiny Spotted Short-horned Caddis) is rarely important in trout streams and is generally found in warmer, larger water than the other two genera.

Agapetus (Tiny black Short-horned Caddis) is quite common in many northern streams.

Matrioptila is an extremely tiny southern genus.


Pictures of 2 Saddle-case Maker Specimens:

Glossosoma (Little Brown Short-horned Sedges) Saddle-case Maker AdultGlossosoma (Little Brown Short-horned Sedges) Saddle-case Maker Adult View 1 Pictures
Collected March 13, 2010 from the Big Thompson River in Montana
Added to Troutnut.com by Bnewell on June 26, 2011
Male Glossosoma alascense Saddle-case Maker AdultMale Glossosoma alascense Saddle-case Maker Adult View 8 PicturesI lost track of this specimen before I could get it under my microscope, but caddis expert Dave Ruiter was able to identify it from pictures as Glossosoma, with an uncertain suggestion of G. alascense as the most likely species.
Collected July 9, 2019 from Rock Creek in Montana
Added to Troutnut.com by Troutnut on July 18, 2019

3 Underwater Pictures of Saddle-case Makers:

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These are glossosomatids, Jason. They are probably Glossosoma nigrior, though it is possible that we are looking at mixed species. The ones to the right with their aggregate of similar sized grains are classic Glossosoma, while the ones to the left with the large anchor pebbles could possibly be Agapetus. Regardless, they're all commonly referred to as saddle case makers. In this picture: Caddisfly Family Glossosomatidae (Saddle-case Makers). From Spring Creek in Wisconsin.
These are glossosomatids, Jason. They are probably Glossosoma nigrior, though it is possible that we are looking at mixed species. The ones to the right with their aggregate of similar sized grains are classic Glossosoma, while the ones to the left with the large anchor pebbles could possibly be Agapetus. Regardless, they're all commonly referred to as saddle case makers.

In this picture: Caddisfly Family Glossosomatidae (Saddle-case Makers).
StateWisconsin
LocationSpring Creek
Date TakenJun 22, 2006
Date AddedJul 1, 2006
AuthorTroutnut
CameraPENTAX Optio WPi
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Three big Ephemerella subvaria mayfly nymphs share a rock with some cased caddis larvae. In this picture: Mayfly Species Ephemerella subvaria (Hendrickson) and Saddle-case Maker Genus Glossosoma (Little Brown Short-horned Sedges). From the Namekagon River in Wisconsin.
Three big Ephemerella subvaria mayfly nymphs share a rock with some cased caddis larvae.

In this picture: Mayfly Species Ephemerella subvaria (Hendrickson) and Saddle-case Maker Genus Glossosoma (Little Brown Short-horned Sedges).
StateWisconsin
LocationNamekagon River
Date TakenMar 20, 2004
Date AddedJan 25, 2006
AuthorTroutnut
CameraOlympus C740UZ
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In this picture: Saddle-case Maker Genus Glossosoma (Little Brown Short-horned Sedges). From the East Branch of Trout Brook in New York.


In this picture: Saddle-case Maker Genus Glossosoma (Little Brown Short-horned Sedges).
StateNew York
LocationEast Branch of Trout Brook
Date TakenSep 20, 2006
Date AddedOct 4, 2006
AuthorTroutnut
CameraPENTAX Optio WPi

Recent Discussions of Glossosomatidae

Glossosoma intermedium or nigrior 5 Replies »
Posted by Wiflyfisher on Jun 30, 2020 in the genus Glossosoma
Last reply on Jul 31, 2020 by Creno
Caught and photographed in the Upper Midwest on May 12, 2020. I resized my original photo for the website.


(User-posted images are only viewable in the forum section.)




Replypupa color 7 Replies »
Posted by LittleJ on Apr 19, 2008 in the genus Glossosoma
Last reply on Apr 22, 2008 by LittleJ
I was thinking very dark olive w/a ginger shuck. Sound right to any of you?
thanks
jeff
ReplyAgapetus are EVERYWHERE!!!! 1 Reply »
Posted by Litobrancha on Apr 12, 2007
Last reply on Apr 12, 2007 by GONZO
Jason

just wanted to spread the word about agapetus. many trout streams have healthy populations of agapetus and there is no reason that some of these species are important to early season emerger/dry fly fishing. small (#18-22) black caddis dry or emerger patterns will mimic them nicely, as well as Dolophilodes Wormaldia and Chimarra.

my colleagues are describing 12 new species of agapetus, mostly from the southeastern united states. i would encourage troutnuts to attempt to collect and rear agapetus pupae. it is pretty easy to do, find pupating cases and remove them from the rocks using forceps and into a small jar of water. If you use a jar with a small amount of water (just a little bit more than required to cover the pupae, removing the small stones around the puparium), then they will pupate in a refrigerator (preferably 60 C or so). Leave the lid loose to allow oxygen to equilibrate with the pupae. This also works for Rhyacophila, which build a similar puparium. We are describing new species of both Agapetus and Rhyacophila and it would be great to have specimens from Troutnuts!!! if interested in doing this, and it is time, email me litobrancha@yahoo.com You can send them to me in alcohol, who knows what else is out there!!!!

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