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.
This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.
I grew up fishing the streams and high lakes of Colorado and loved the days on the Arkansas River. I now reside in Missouri and enjoy the Niangua, Taneycomo and the White whenever possible. Look forward to hearing peoples thoughts.
His
JJ