ID for stonefly from lower tidal coastal river ?

[Gyrfalcon22]

I don't get to see many insects often in the tide pools on this lower tidal area of this large coastal river-Chehalis River WA

 

[Pink Nighty]

Looks like a patsus rubberleggus indicatoredi to my eye. Maybe wrap a mallard flank around if you want to rubberleggus swingus

 

[Taxon]

Hi Gyrfalcon22-

I believe this stonefly nymph to be of family Perlidae, and that its scientific name is Calineuria californica, and that its common name is Western Stone.

 

[Taxon]

For purpose of comparison, please see the nymphal photos of Calineuria californica on Troutnut.

 

[Gyrfalcon22]

Thanks for the information !

 

[tkww]

I was going to say Golden stone, but that just a hunch. Thanks Roger!

 

[Taxon]

I was going to say Golden stone, but that just a hunch. Thanks Roger!

Golden Stone would have been a good guess. However, that common name is used for adults and nymphs of larger Acroneuria, Agnatina, Calineuria, Hesparoperla species. As I recall, Bill Stark assembled a team of Stonefly taxonomists. who proceeded to assign a common name to each species of North American stonefly known at that time. Western Stone is the common name they chose for Calineuria californica.

 

[Troutnut]

I agree with Roger that Calineuria californica is the most promising guess. The markings at least look very similar to the reference specimen on my website, although I wasn't 100 % positive about the ID on that one. The characteristics needed for a definitive ID in the key unfortunately are pretty much microscope-only.