Key to common families of crustaceans in Spencer Creek

4a) First 2 or 3 pairs of legs with pincers (chelate). Generally >20mm in length.
Crayfishes: CAMBARIDAE




4b) Pincers absent, although first pair of legs may be adapted for grasping (gnathopod). Generally
<15mm in length. Isopods: ASELLIDAE




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