Central Taxonomic Thesaurus
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  Animalia
      Arthropoda
        Hexapoda
               [Apterygota]
            Insecta
              Pterygota
                Palaeoptera
                       [Paleoptera]
                    Ephemeroptera
                      Furcatergalia
                        Scapphodonta
                          Ephemeroidea
                            Ephemeridae
                                     Ephemera
                                             Ephemera blanda
                                                   [Ephemera triplex]
                                             Ephemera compar
                                             Ephemera guttulata
                                             Ephemera simulans
                                                   [Ephemera decora]
                                                   [Ephemera natata]
                                                   [Palingenia natata]
                                             Ephemera traverae
                                                   [Ephemera traveri]
                                             Ephemera varia
                                     Hexagenia
                                             Hexagenia albivitta
                                                   [Baetis albivitta]
                                                   [Hexagenia albivittata]
                                                   [Hexagenia benedicta]
                                                   [Hexagenia dominans]
                                                   [Palingenia continua]
                                                   [Palingenia dorsigera]
                                             Hexagenia atrocaudata
                                             Hexagenia bilineata
                                                   [Baetis bilineata]
                                                   [Palingenia bilineata]
                                             Hexagenia limbata
                                                   [Ephemera limbata]
                                                   [Hexagenia affiliata]
                                                   [Hexagenia angulata]
                                                   [Hexagenia californica]
                                                   [Hexagenia carolina]
                                                   [Hexagenia elegans]
                                                   [Hexagenia kanuga]
                                                   [Hexagenia limbata californica]
                                                   [Hexagenia limbata limbata]
                                                   [Hexagenia limbata occulta]
                                                   [Hexagenia limbata venusta]
                                                   [Hexagenia limbata viridescens]
                                                   [Hexagenia marilandica]
                                                   [Hexagenia mingo]
                                                   [Hexagenia munda affiliata]
                                                   [Hexagenia munda elegans]
                                                   [Hexagenia munda marilandica]
                                                   [Hexagenia munda munda]
                                                   [Hexagenia munda]
                                                   [Hexagenia occulta]
                                                   [Hexagenia pallens]
                                                   [Hexagenia rosacea]
                                                   [Hexagenia variabilis]
                                                   [Hexagenia venusta]
                                                   [Hexagenia viridescens]
                                                   [Hexagenia weewa]
                                                   [Palingenia limbata]
                                                   [Palingenia occulta]
                                                   [Palingenia viridescens]
                                             Hexagenia mexicana
                                             Hexagenia orlando
                                                   [Hexagenia munda orlando]
                                             Hexagenia rigida
                                     Litobrancha
                                             Litobrancha recurvata
                                                   [Hexagenia recurvata]