#genus_Trionyx__Trionyx  type genus of the Trionychidae
  supertype:  reptile_genus__reptilegenu  a genus of reptiles
  member of:  family_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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