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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.

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.
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Stonefly Species Allocapnia minima (Little Snowflies)

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: Epiproct And Dorsal Process Structure In The Allocapnia Forbesi Frison, Allocapnia Pygmaea (Burmeister), And Allocapnia Rickeri Frison Species Groups (Plecoptera: Capniidae), And Inclusion Of Allocapnia Minima (Newport) In A New Species Group

Male epiproct. Apical segment of upper limb flattened in lateral aspect and ca. 198 µm long; apical ca. 31 µm armed with a series of appressed processes separated by narrow grooves and terminating in elongate, flattened spines (Figs. 37 - 41), remainder of apical segment armed with widely separated long, thick setae; apical segment ca. 83 - 86 µm wide throughout length and bluntly rounded at tip. Basal segment of upper limb ca. 62 µm wide, without mesal longitudinal groove. Lower limb ca. 96 µm wide near apical spoon. Male tergal process. Prominent thimble-shaped, undivided structure on tergum 8 slanted caudad and ca. 54 µm wide at tip; apex covered with scale-like structures (Fig. 40 - 42).


Start a Discussion of Allocapnia minima

Stonefly Species Allocapnia minima (Little Snowflies)

Taxonomy
Species Range
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