#family_Trionychidae__Trionychidae  soft-shelled turtles
  supertype:  #reptile_family__reptilefamily  a family of reptiles
  member of:  #order_Chelonia
  member:  #soft-shelled_turtle__pancake_turtle__pancaketurtle  voracious aquatic turtle with a flat flexible shell covered by a leathery skin; can inflict painful bites
  member:  #genus_Trionyx__Trionyx  type genus of the Trionychidae
     member:  #spiny_softshell__spinysoftshell__Trionyx_spiniferus  river turtle of western United States with a warty shell; prefers quiet water
     member:  #smooth_softshell__Trionyx_muticus  river turtle of Mississippi basin; prefers running water

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