Central Taxonomic Thesaurus
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  Animalia
      Arthropoda
        Hexapoda
               [Apterygota]
            Insecta
              Pterygota
                Palaeoptera
                       [Paleoptera]
                    Ephemeroptera
                      Carapacea
                            Baetiscidae
                                   [Prosopistomatoidea]
                                     Baetisca
                                             Baetisca becki
                                             Baetisca berneri
                                             Baetisca callosa
                                             Baetisca carolina
                                                   [Baetisca thomsenae]
                                             Baetisca columbiana
                                             Baetisca escambiensis
                                             Baetisca gibbera
                                             Baetisca lacustris
                                                   [Baetisca bajkovi]
                                             Baetisca laurentina
                                             Baetisca obesa
                                                   [Baetis obesa]
                                             Baetisca rogersi
                                             Baetisca rubescens
                                                   [Baetis rubescens]
                                                   [Cloe rubescens]