Central Taxonomic Thesaurus
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  Animalia
      Arthropoda
        Hexapoda
               [Apterygota]
            Insecta
              Pterygota
                Neoptera
                       [Endopterygota]
                       [Exopterygota]
                  Neuropterida
                    Megaloptera
                            Sialidae
                                     Sialis
                                           [Protosialis]
                                             Sialis aequalis
                                             Sialis americana
                                                   [Protosialis americana]
                                                   [Sialis ferrugineus]
                                             Sialis arvalis
                                             Sialis bilobata
                                             Sialis californica
                                             Sialis concava
                                             Sialis contigua
                                             Sialis cornuta
                                             Sialis dreisbachi
                                             Sialis glabella
                                             Sialis hamata
                                             Sialis hasta
                                             Sialis infumata
                                             Sialis iola
                                             Sialis itasca
                                             Sialis joppa
                                             Sialis mohri
                                             Sialis nevadensis
                                             Sialis nina
                                             Sialis occidens
                                             Sialis rotunda
                                             Sialis spangleri
                                             Sialis vagans
                                             Sialis velata