| Citation | Smithsonian Institution, 2016 Alvania gradata (d' Orbigny, 1842). http://collections.si.edu/search/results.htm?q=Alvania%09gradata [Accessed 14/11/2016]. |
| Ref. | 113205 Smithsonian Institution, 2016 |
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| Named Used as Valid | Alvania gradata |
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