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.
Option 1 | Option 2 |
---|---|
Left and right metanotal sa1 sclerites usually fused in the middle into a single sclerite (sf 19.321), but occasionally separated by small gap | Metanotal sa1 sclerites clearly separate (sf 19.322) |
Case of hollow twig with ring of bark pieces anteriorly (sf 19.446a) or case entirely of wood fragments (sf 19.446b) West | |
Remaining genera: Eocosmoecus and Onocosmoecus | |
3 Example Specimens | |
Amphicosmoecus Species Amphicosmoecus canax No further information about this genus is available on Troutnut.com at this time. | Go to Couplet 39 |