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  Animalia
    Radiata
      Cnidaria
        Medusozoa
            Hydrozoa
                   [Leptolida]
              Hydroidolina
                     [Hydroida]
                    Anthoathecatae
                           [Anthomedusae]
                           [Athecatae]
                           [Stylasterina]
                      Filifera
                             [Hydractinioidea]
                            Russelliidae
                                     Russellia
                                             Russellia mirabilis