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 is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).
Thyridial cell: The thyridial cell (denoted tc) is cell in caddisfly wings formed by the fork between MP@t and Cu1 being closed apically by the medio-cubital crossvein. It is especially distinctive in the forewings and frequently used as an identifying characteristic.
These other words reference the same concept: tc, cell tc, tc cell.
