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Organism
  Animalia
         [Metazoa]
      Platyhelminthes
        Rhabditophora
               [Archoophora]
               [Turbellaria]
            Trepaxonemata
                    Neoophora
                           [Lecithoepitheliata]
                           [Neorhabdocoela]
                           [Prolecithophora]
                      Dalyellioida
                            Dalyelliidae
                                     Castrella
                                             Castrella graffi
                                             Castrella pinguis
                                     Dalyellia
                                             Dalyellia viridis
                                     Debeauchampiola
                                     Gieysztoria
                                     Jensenia
                                             Jensenia lewisi
                                     Microdalyella
                                             Microdalyella abursalis
                                             Microdalyella circobursalis
                                             Microdalyella fairchildi
                                             Microdalyella fusca
                                             Microdalyella gilesi
                                             Microdalyella rheesi
                                             Microdalyella rochesteriana
                                             Microdalyella rossi
                                             Microdalyella ruebushi
                                             Microdalyella sillimani
                                             Microdalyella tennessensis
                                     Microdalyellia
                                             Microdalyellia gilesi
                                                   [Dalyellia gilesi]
                                     Polliculus