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  Animalia
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     Deuterostomia
      Chordata
        Vertebrata
         Gnathostomata
          Osteichthyes
            Actinopterygii
              Neopterygii
                    Semionotiformes
                           [Holostei]
                           [Lepisosteiformes]
                           [Lepisostoidei]
                            Lepisosteidae
                                     Atractosteus
                                             Atractosteus spatula
                                                   [Lepisosteus spatula]
                                             Atractosteus tristoechus
                                             Atractosteus tropicus
                                     Lepisosteus
                                           [Cylindrosteus]
                                             Lepisosteus oculatus
                                                   [Cylindrosteus productus]
                                                   [Lepisosteus productus]
                                             Lepisosteus osseus
                                             Lepisosteus platostomus
                                             Lepisosteus platyrhincus