#order_Ichthyosauria__Ichthyosauria  extinct marine reptiles: ichthyosaurs
  supertype:  #animal_order  the order of animals
  member of:  #subclass_Archosauria
  member:  #ichthyosaur  any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs
  member:  #family_Ichthyosauridae__Ichthyosauridae  later ichthyosaurs of the Jurassic and Cretaceous; widely distributed in both hemispheres
     member:  #genus_Ichthyosaurus  type genus of the Ichthyosauridae
        member:  #ichthyosaurus__ichthyosauru  ichthyosaurs of the Jurassic
     member:  #genus_Stenopterygius  a reptile genus of Ichthyosauridae
        member:  #stenopterygius__Stenopterygius_quadrisicissus  an ichthyosaur of the genus Stenopterygius

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