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).
Cubitus: The cubitus (denoted Cu) is the fifth major longitudinal wing vein in insects, located behind the media. In stoneflies, it usually branches near the base into an anterior for Cu1 and posterior fork Cu2.
These other words reference the same concept: vein Cu, Cu vein, Cu, vein Cu1, vein Cu2, Cu2 vein, Cu2, vein Cu1, Cu2 vein, Cu2.
