Key to common families of crustaceans in Georgian Bay

3a) A few thick hairs present at posterior edge of abdomenal segments 1 to 3. Accessory
flagellum of antenna 1 with more than 2 segments. (common) GAMMARIDAE




3b) No spines at posterior edge of abdomenal segments 1 to 3. Accessory flagellum of antenna 1
with only 2 segments. (rare). CRANGONYCTIDAE




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