Polyspermophyllum nov. nomenclatorial act: protologue/first publicationBibliography: Polyspermophyllum, a New Permian Gymnosperm form Argentina, with Considerations about the DicranophyllalesPage: 122diagnosis: as for the only species systematic position: Dicranophyllales?typeseries: Polyspemophyllum sergiiClassification: Polyspermophyllum