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†Polycostella beckmannii Thierstein 1971
urn:lsid:organismnames.com:name:2300653
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483
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†Polycostella beckmannii Thierstein 1971
Thierstein 1971. Tentative Lower Cretaceous calcareous nanno-plankton zonation. Eclogae Geologicae Helvetiae, 64 1971: 459-488