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Stonefly Genus Pteronarcys (Salmonflies)

Taxonomic Navigation -?-
» Genus Pteronarcys (Salmonflies)
Species in PteronarcysNumber of SpecimensNumber of Pictures
Pteronarcys bilobaKnobbed Salmonfly00
Pteronarcys californicaGiant Salmonfly00
Pteronarcys dorsataGiant Black Stonefly00
Pteronarcys princepsEbony Salmonfly00
Pteronarcys proteusSalmonfly00

3 species aren't included.
Common Name
MatchCommon Name
***Salmonflies


Pictures Below ↓

This is page 2 of specimens of Pteronarcys. Visit the main Pteronarcys page for:

  • The behavior and habitat of Pteronarcys.

Pictures of 14 Stonefly Specimens in the Genus Pteronarcys:

Specimen Page:123
Pteronarcys dorsata (Giant Black Stonefly) Stonefly NymphPteronarcys dorsata (Giant Black Stonefly) Stonefly Nymph View 7 Pictures
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Female Pteronarcys californica (Giant Salmonfly) Stonefly AdultFemale Pteronarcys californica (Giant Salmonfly) Stonefly Adult View 11 Pictures
Collected July 2, 2019 from the Gallatin River in Montana
Added to Troutnut.com by Troutnut on July 18, 2019
Female Pteronarcys californica (Giant Salmonfly) Stonefly AdultFemale Pteronarcys californica (Giant Salmonfly) Stonefly Adult View 13 Pictures
Collected June 30, 2019 from the Madison River in Montana
Added to Troutnut.com by Troutnut on July 17, 2019
Male Pteronarcys californica (Giant Salmonfly) Stonefly AdultMale Pteronarcys californica (Giant Salmonfly) Stonefly Adult View 16 Pictures
Collected July 2, 2019 from the Gallatin River in Montana
Added to Troutnut.com by Troutnut on July 18, 2019
Pteronarcys dorsata (Giant Black Stonefly) Stonefly NymphPteronarcys dorsata (Giant Black Stonefly) Stonefly Nymph View 3 PicturesPteronarcys nymphs live for two years before maturing. This small one is in its first year.
Collected March 10, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 19, 2006
Pteronarcys californica (Giant Salmonfly) Stonefly NymphPteronarcys californica (Giant Salmonfly) Stonefly Nymph View 13 Pictures
Collected July 2, 2019 from the Gallatin River in Montana
Added to Troutnut.com by Troutnut on July 18, 2019
Female Pteronarcys californica (Giant Salmonfly) Stonefly AdultFemale Pteronarcys californica (Giant Salmonfly) Stonefly Adult View 14 Pictures
Collected July 2, 2019 from the Gallatin River in Montana
Added to Troutnut.com by Troutnut on July 18, 2019
Pteronarcys californica (Giant Salmonfly) Stonefly NymphPteronarcys californica (Giant Salmonfly) Stonefly Nymph View 9 Pictures
Collected July 2, 2019 from the Gallatin River in Montana
Added to Troutnut.com by Troutnut on July 18, 2019
Pteronarcys californica (Giant Salmonfly) Stonefly NymphPteronarcys californica (Giant Salmonfly) Stonefly Nymph View 2 PicturesHere are two size classes of Pteronarcys nymphs. These probably represent two different generations. The largest will probably emerge next spring and the other in two years. There is probably another generation, smaller, I did not collect. In a Canadian study they discovered Pteronarcys eggs do not all hatch simultaneously but hatch for a period of nearly two years, making their egg/nymphal life 5 years. The other photo is of a curled nymph, a typical response to disturbance.
Collected August 10, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on August 10, 2011
Male Pteronarcys californica (Giant Salmonfly) Stonefly AdultMale Pteronarcys californica (Giant Salmonfly) Stonefly Adult View 1 PicturesThis shows the adult and its exuviae.
Collected May 1, 2007 from the Jocko River in Montana
Added to Troutnut.com by Bnewell on June 26, 2011
Specimen Page:123
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