Nymphs of this species were fairly common in late-winter kick net samples from the upper Yakima River. Although I could not find a key to species of
Zapada nymphs, a revision of the
Nemouridae family by
Baumann (1975) includes the following helpful sentence: "2
cervical gills on each side of midline, 1 arising inside and 1 outside of
lateral cervical sclerites, usually single and elongate, sometimes constricted but with 3 or 4 branches arising beyond gill base in
Zapada cinctipes." This specimen clearly has the branches and is within the range of that species.