136
IDENTIFICATION KEY TO NEBRASKA'S CRAYFISHES
1A. Carapace covered with small tubercles giving it
the appearance and feel of coarse sandpaper
Go to 6
1B. Carapace relatively smooth with many small pits
but few or no tubercles.
Go to 2
2A. Rostrum with median carina or "bump" in
groove (see arrow)
Ringed crayfish, Orconectes neglectus
2B. Rostrum without median carina
Go to 3
3A. Rostrum short, blunt and curves down
Go to 4
