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Organism
  Animalia
         [Metazoa]
      Echinodermata
             [Eleutherozoa]
             [Pelmatoza]
             [Pelmatozoa]
        Asterozoa
               [Stelleroidea]
            Asteroidea
                   [Concentricycloidea]
                  Valvatacea
                    Paxillosida
                            Radiasteridae
                                   [Mimasterinae]
                                   [Mimasteridae]
                                     Radiaster
                                           [Mimaster]
                                             Radiaster elegans
                                             Radiaster tizardi