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