Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
Described by Ricker, W.E. & Ross, H.H. (1968) North American species of Taeniopteryx (Plecoptera, Insecta). Journal of the Fisheries Research Board of Canada 25, 1423–1439.