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Polysphaeridium williamsii
| williamsii | |
| Boltenhagen, E. (1977) | |
| Lentin, J.K. and Williams, G.L. (1981) | |
| P-williamsii Alberti, 1961, Palaeontographica, Abt. A vol.116, 1.jpg | |
| junior synonym | |
| 100 | |
| 89 | |
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No synonyms
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