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Male Calineuria californica (Golden Stone) Stonefly Adult Pictures

 A few of these larger stoneflies were fluttering around the South Fork on an evening dominated by much smaller species.

This one has been difficult to identify. I can't spot any of the gill remnants characteristic of Perlidae, but the wing venation (Venation: The pattern in which the veins on the wings of an insect are arranged. It is usually one of the most useful identifying characteristics.) seems to point in that direction. I tried keying it out as Perlodidae but arrived at Isoperla, every western species of which has significantly smaller bodies than this one.

Edit: See forum comments for a likely correct identification.


This stonefly was collected from the South Fork Snoqualmie River on July 20th, 2019 and added to Troutnut.com on July 22nd, 2019.

I plan to try to start capturing wing venation in more of my photos for better identifiability.  Male Calineuria californica (Golden Stone) Stonefly Adult from the South Fork Snoqualmie River in Washington
I plan to try to start capturing wing venation in more of my photos for better identifiability.
Taken with my usual glare-reducing polarized light and filter.  Male Calineuria californica (Golden Stone) Stonefly Adult from the South Fork Snoqualmie River in Washington
Taken with my usual glare-reducing polarized light and filter.
Taken without my usual glare-reducing polarized light and filter, so the glare might enhance some details.  Male Calineuria californica (Golden Stone) Stonefly Adult from the South Fork Snoqualmie River in Washington
Taken without my usual glare-reducing polarized light and filter, so the glare might enhance some details.
Taken without my usual glare-reducing polarized light and filter, so the glare might enhance some details.  Male Calineuria californica (Golden Stone) Stonefly Adult from the South Fork Snoqualmie River in Washington
Taken without my usual glare-reducing polarized light and filter, so the glare might enhance some details.
Taken with my usual glare-reducing polarized light and filter.  Male Calineuria californica (Golden Stone) Stonefly Adult from the South Fork Snoqualmie River in Washington
Taken with my usual glare-reducing polarized light and filter.

Recent Discussions of this Adult

Hesperoperla or Calineuria 2 Replies »
Posted by Millcreek on Jul 22, 2019
Last reply on Jul 22, 2019 by Millcreek
Hesperoperla or Calineuria. Just a guess. These are similar to ones I've netted in California. The gill remnants don't always show and can be difficult to spot when they do. The size is right and the wing veining as well.

Here's a picture at bugguide of Hesperoperla.

https://bugguide.net/node/view/1257709

I'm leaning more towards Calineuria.
https://www.zoology.ubc.ca/~biodiv/entomology/main/Plecoptera/Perlidae/Calineuria%20californica%20(1dorsal).jpg

And here's a view of Hesperoperla's wings.

https:/bugguide.net/node/view/41324/bgimage
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