| Filter: Genus=%Helisoma%; | Sort by: Accession # Taxon Locality |
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| AccessionNo | Genus | Species | TypeStatus | AuthorDate | Country | State | County | Formation | Age | |
| 12526.00 | Helisoma | ammon | VOUCHER | Hanna, 1963 | USA | California | San Bernardino | PLEISTOCENE | Details | |
| 61973.03 | Helisoma (Perrinilla) | cordillerana | LECTOTYPE | Hannibal, 1912 | USA | Nevada | Mineral | Esmeralda | MIOCENE | Details |
| 61988.01 | Helisoma (Perrinilla) | cordillerana | VOUCHER | Hannibal, 1912 | USA | Nevada | Esmeralda | Esmeralda | MIOCENE | Details |
| 9829.00 | Helisoma (Perrinilla) | cordillerana | PARATYPE | Hannibal, 1912 | USA | Nevada | Mineral | Esmeralda | MIOCENE | Details |
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