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  Animalia
      Arthropoda
        Crustacea
            Maxillopoda
                   [Maxillipoda]
              Thecostraca
                Cirripedia
                  Thoracica
                    Sessilia
                      Balanomorpha
                          Balanoidea
                            Pyrgomatidae
                                     Ceratoconcha
                                             Ceratoconcha domingensis
                                             Ceratoconcha floridana
                                     Megatrema
                                             Megatrema madreporarum