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Organism
  Animalia
         [Metazoa]
      Mollusca
            Bivalvia
                   [Conchifera]
                   [Lamellibranchiata]
                   [Pelecypoda]
              Autobranchia
               Pteriomorphia
                    Pectinida
                          Entolioidea
                            Entoliidae
                                     Entolium
                                             Entolium alaskanum
                                     Pectinella
                                             Pectinella aequoris
                                             Pectinella sigsbeei
                                     Scythentolium
                                             Scythentolium kokeni