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

INHS Collections Data

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  Animalia
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      Mollusca
            Gastropoda
                   [Orthogastropoda]
              Caenogastropoda
                    Littorinimorpha
                          Littorinoidea
                            Pomatiidae
                                     Cistula
                                     Cyclostoma
                                     Cyclotopsis
                                     Leonia
                                     Pomatias
                                     Tropidophora
                                     Tudorella