This species was formerly classified as Alloperla pallidula.
» Species pallidula (Sallfly)
In my experience, most of my mid-summer collections of small yellow Chloroperlids in the northwest have keyed out to this species. Where & When
Region: WestThis yellow species is regarded as common.Suwallia pallidula Fly Fishing TipsI've found trout eager to hit small yellow sally dry flies at these times, although I think they were just being opportunistic. I haven't seen enough of these flies on the water to make the trout selective, but it might be worth considering an imitation when fishing to wary trout that are more likely to hit familiar-looking food than random attractors (Attractor: Flies not designed to imitate any particular insect, but to incorporate characteristics attractive to trout. When trout aren't feeding selectively, attractors often outperform careful imitations as searching patterns because they are easier to see and incorporate more strike-triggering characteristics. They include legends like the Adams, Bivisible, and Royal Wulff.).
Pictures of 5 Stonefly Specimens in the Species Suwallia pallidula:
Suwallia pallidula (Sallfly) Stonefly Nymph
View 6 PicturesThis specimen keys out to Suwallia, for which I did not find any nymph species keys. However, I'm placing it in Suwallia pallidula because I caught a few adults in the same spot that closely resembled the abundant nymphs and keyed them out to species. Features I noted under the microscope when keying this specimen to genus included apical (Apical: Close to the apex; tip or end.) hairs of cercal segments that were directed at posterior (Posterior: Toward the back of an organism's body. The phrase "posterior to" means "in back of.") angles, and the longest apical (Apical: Close to the apex; tip or end.) hairs of distal (Distal: Far from the point of attachment or origin; near the tip.) segments were shorter than their following segment.
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