#genus_Sphenodon__Sphenodon  coextensive with the order Rhynchocephalia: tuataras
  supertype:  reptile_genus__reptilegenu  a genus of reptiles
  member of:  order_Rhynchocephalia
  member:  tuatara__Sphenodon_punctatum  only extant member of the order Rhynchocephalia of large spiny lizard-like diapsid reptiles of coastal islands off New Zealand

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