Key to common families of crustaceans in Georgian Bay

2a) Single spine projecting posteriorly along dorsal surface of abdominal segments 1 to 3.
Generally <10mm in length. Dorsal pair of antenna shorter in length than ventral pair.
TALITRIDAE




2b) Single spine absent along dorsal surface of abdominal segments 1 to 3. Dorsal pair of
antenna longer in length than ventral pair. 3




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