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Insect Order Plecoptera (Stoneflies)

Pictures Below

This is page 13 of specimens of Plecoptera. Visit the main Plecoptera page for:

  • The behavior and habitat of Plecoptera.
  • 6 underwater pictures of Plecoptera.
  • 1 streamside picture of Plecoptera.

Pictures of 140 Stonefly Specimens:

Specimen Page:1...12131415
Plecoptera (Stoneflies) Stonefly NymphPlecoptera (Stoneflies) Insect Nymph View 3 PicturesThis is a really small stonefly adult, about 3/8 of an inch body length.
Collected April 28, 2004 from the Namekagon River, below Lake Hayward in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Female Pictetiella expansa Stonefly AdultFemale Pictetiella expansa  Stonefly Adult View 12 PicturesBased on photos, this specimen seems to key out (using Merritt & Cummins 4th Edition) to Pictetiella expansa, but some of the characteristics aren't 100 % clear. However, that species is listed as occurring near Puget Sound and the head markings are similar to (albeit not a perfect match for) those of a male from Colorado in the scientific literature here: https://www.researchgate.net/figure/Head-and-pronotum (Pronotum: The top of the insect prothorax.)-dorsal (Dorsal: Top.)-Pictetiella-expansa-Boulder-Co-Colorado-North-Fork-Middle_fig1_315373449
Collected June 16, 2018 from the South Fork Snoqualmie River in Washington
Added to Troutnut.com by Troutnut on July 3, 2018
Isoperla quinquepunctata (Little Yellow Stonefly) Little Yellow Stonefly NymphIsoperla quinquepunctata (Little Yellow Stonefly) Stonefly Nymph View 2 PicturesSize - (excluding tails) - 10 mm
Status at time of photo - preserved but no discernible color change as specimen was captured only a few days earlier.
Key characters - unique pattern on dorsal (Dorsal: Top.) head and thorax (Thorax: The thorax is the middle part of an insect's body, in between the abdomen and the head, and to which the legs and wings are attached.); dark medial (Medial: Toward the middle of the body.) terga (Tergum: the dorsal part of an abdominal segment or segments (terga). Also used to describe the entire abdominal dorsum or the thoracic dorsal segments of Odonata.) stripe between two paler stripes

This species is very common in west slope north Sierra watersheds. Richard W. Baumann & Boris C. Kondratieff did a study on the same section and at the same time of year (APRIL 25-29, 2010) where this specimen was taken. No other species of Isoperla were reported from this location and quinquepunctata was very abundant. Their hatches can be very heavy some Springs.

Entoman
Collected March 21, 2011 from the Lower Yuba River in California
Added to Troutnut.com by Entoman on November 1, 2011
Claassenia sabulosa (Golden Stone) Stonefly NymphClaassenia sabulosa (Golden Stone) Stonefly Nymph View 2 PicturesThis is a stonefly that has recently molted and has not yet darkened.
Collected May 14, 2005 from the Jocko River in Montana
Added to Troutnut.com by Bnewell on June 28, 2011
Male Isoperla fulva (Yellow Sally) Stonefly AdultMale Isoperla fulva (Yellow Sally) Stonefly Adult View 2 PicturesThese Isoperla are loaded with red parasitic mites.
Collected June 6, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on June 26, 2011
Perlidae (Golden Stones) Stonefly NymphPerlidae (Golden Stones) Stonefly Nymph View 2 PicturesThis is a nymph that has recently molted thus has not yet acquired its normal coloration.
Collected June 15, 2010 from the Flathead River-upper in Montana
Added to Troutnut.com by Bnewell on June 26, 2011
Claassenia sabulosa (Golden Stone) Stonefly AdultClaassenia sabulosa (Golden Stone) Stonefly Adult View 2 PicturesThese are photos of the nymphal exuvia a sure sign that emergence is in progress, especially when you see these at the water's edge.
Collected May 24, 2007 from the Flathead River-lower in Montana
Added to Troutnut.com by Bnewell on July 1, 2011
Specimen Page:1...12131415
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