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  Animalia
    Radiata
      Cnidaria
        Medusozoa
            Hydrozoa
                   [Leptolida]
              Trachylina
                    Trachymedusae
                            Ptychogastriidae
                                     Pectanthis
                                     Ptychogastria
                                             Ptychogastria asteroides
                                                   [Pectanthis asteroides]
                                             Ptychogastria polaris
                                     Tesserogastria
                                             Tesserogastria musculosa