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

Salmonflies
Pteronarcys californica

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

This is one of the many shallow, unnamed lakes in the Arctic coastal plain near the Dalton Highway.

From Dalton Highway in Alaska

Stream photos

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Limnephilus (Summer Flier Sedge) Caddisfly Larva Limnephilus (Summer Flier Sedge) Caddisfly Larva

Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River in Washington

This seems to be a young larva of Limnephilus. Although not clear in the picture, several ventral abdominal segments have chloride epithelia.

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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.

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Stonefly Species Sasquacapnia sasquatchi (Little Snowflies)

Species Range

source

Map of specific collection sites

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.

Description from GBIFthe Global Biodiversity Information Facility

Source: A Review Of The Genus Bolshecapnia Ricker, 1965 (Plecoptera: Capniidae), And Recognition Of Two New Nearctic Capniid Genera

Male epiproct (n = 3). Length 718 µm, width at mid-length about 147 µm, width near base 158 µm, greatest width 194 µm, subapical width at narrowest point 70 µm. Epiproct body broad basally and narrowed gradually to subapical bottleneck (Figs. 67, 70 - 71) in dorsal and lateral aspect; apex bearing complexly lobed membranous tissue above a well formed ventral lip (Figs. 69, 71). Median groove well developed, with a pair of parallel ridges extending subapically to near base of dorsobasal sclerites (Figs. 67, 70). Dorsobasal sclerites short, broad and apically pointed (Figs. 68, 72). Tergal process (n = 2). A pair of hairy, low rounded hump-like structures located on tergum 9 (Figs. 67, 71). Vesicle (n = 3). Similar to Sasquacapnia missiona but slightly more rounded in ventral aspect.

Female subgenital plate (n = 1). Correctly associated and illustrated in figs. 13 - 14, by Baumann & Potter (2007). Ricker’s earlier figure for this structure is now attributed to Sasquacapnia missiona (Baumann & Potter 2007). The posterior margin of the plate is truncate and scarcely projects beyond the posterior margin of sternum 8.

New combination http: // lsid. speciesfile. org / urn: lsid: Plecoptera. speciesfile. org: TaxonName: 505899 (Figs. 67 - 72)

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