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†Polonosphaeridium ordovicum Gorka 1987
urn:lsid:organismnames.com:name:642726
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288
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†Polonosphaeridium ordovicum Gorka 1987
Gorka 1987. Acritarches et Prasinophyceae de l'Ordovicien Moyen (Viruen) du Sondage de Smedsby Gard No. 1 (Gotland, Suede). Review of Palaeobotany and Palynology, 52(4) 1987: 257-297