Header image
Enter a name
Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Dorsal view of a Skwala (Perlodidae) (Large Springfly) Stonefly Nymph from the Yakima River in Washington
This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Caddisfly Species Culoptila thoracica (Saddle-case Makers)

Where & when

In 19 records from GBIF, adults of this species have been collected during July (47%), June (32%), August (16%), and May (5%).

In 11 records from GBIF, this species has been collected at elevations ranging from 5187 to 10331 ft, with an average (median) of 6079 ft.

Species Range

Physical description

Most physical descriptions on Troutnut are direct or slightly edited quotes from the original scientific sources describing or updating the species, although there may be errors in copying them to this website. Such descriptions aren't always definitive, because species often turn out to be more variable than the original describers observed. In some cases, only a single specimen was described! However, they are useful starting points.

Source: Revision of the genus Culoptila (Trichoptera: Glossosomatidae)

Adult. Length of forewing: male 2.8 – 3.2 mm; female 3.2 – 3.8 mm. Color yellowish-brown in alcohol, appendages paler; wing uniformly colored, without evidence of cross bar. Mesothorax of male narrow and greatly acute anteromesally; mesoscutal wart elongate, narrowed, sharply angulate anteromesally; mesoscutal setae long. Mesothoracic tegulae of male rounded, greatly enlarged; tegular setae long; tegular gland elongate, pleated, concertina-­like. Male genitalia. Sternum VI process short, subtruncate. Tergum IX ventral margin rounded, tapered from anterolateral margin, slightly produced posteroventrally. Inferior appendages short, subtruncate apically. Tergum X short, about as long as wide, apex in ventral view truncate to subtruncate; ventrolateral processes with apices incurved, nearly planar in caudal view, mesal margin acute; apices not or scarcely posteriorly bent. Phallobase large, rounded anteriorly, with dorsal and ventral margins subparallel, apicodorsal projection short, with slight upward inflection at base, apex subacute. Phallic apparatus with 2 phallic spines, subequal in length, about 1 / 2 length of phallobase, strongly sinuously curved.

Start a Discussion of Culoptila thoracica

Caddisfly Species Culoptila thoracica (Saddle-case Makers)

Species Range
Common Name
Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy