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Organism
  Animalia
      Echinodermata
            Echinoidea
              Euechinoidea
                    Temnopleuroida
                            Toxopneustidae
                                     Lytechinus
                                             Lytechinus euerces
                                             Lytechinus panamensis
                                             Lytechinus pictus
                                             Lytechinus variegatus
                                             Lytechinus williamsi
                                     Toxopneustes
                                             Toxopneustes pileolus
                                             Toxopneustes roseus
                                     Tripneustes
                                             Tripneustes depressus
                                             Tripneustes ventricosus