Pervosphaeridium brevispinum
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brevispinum (Norvick, 1976, p.53, pl.4, figs.5-6) Below, 1982c, p.27. Holotype: Norvick, 1976, pl.4, figs.5-6. Originally Exochosphaeridium, subsequently Exochosphaeridium?, thirdly (and now) Pervosphaeridium. Age: Cenomanian.
Parent: Pervosphaeridium