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  Animalia
      Arthropoda
        Hexapoda
               [Apterygota]
            Insecta
              Pterygota
                Neoptera
                       [Endopterygota]
                       [Exopterygota]
                    Coleoptera
                      Polyphaga
                        Staphyliniformia
                          Hydrophiloidea
                            Georyssidae
                                   [Georissinae]
                                     Georyssus
                                       Georyssus (Georyssus)
                                             Georyssus californicus
                                             Georyssus pusillus