#family_Polyodontidae__Polyodontidae  paddlefishes
  supertype:  fish_family  any of various families of fish
  member of:  order_Ganoidei
  member:  genus_Polyodon__Polyodon  type genus of the Polyodontidae
     member:  paddlefish__duckbill__Polyodon_spathula  primitive fish of the Mississippi valley having a long paddle-shaped snout
  member:  genus_Psephurus__Psephurus  a genus of Polyodontidae
     member:  Chinese_paddlefish__Psephurus_gladis  fish of larger rivers of China similar to the Mississippi paddlefish

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