University of Illinois at Urbana-Champaign
Prairie Research Institute
Illinois Natural History Survey

INHS Collections Data

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Organism
  Animalia
    Bilateria
     Protostomia
     Lophozoa
      Mollusca
            Gastropoda
                   [Orthogastropoda]
                    Basommatophora
                            Siphonariidae
                                     Siphonaria
                                             Siphonaria alternata
                                             Siphonaria brannani
                                             Siphonaria lecanium
                                             Siphonaria maura
                                             Siphonaria pectinata
                                             Siphonaria serrata
                                                   [Siphonaria natalensis]
                                             Siphonaria thersites
                                     Williamia
                                             Williamia krebsii
                                                   [Williamia krebsi]
                                             Williamia peltoides
                                             Williamia radiata