#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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