Exochosphaeridium cenomaniense

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"?cenomaniense" Norvick, 1976, p.52-53, pl.4, figs.4,8.  Holotype: Norvick, 1976, pl.4, fig.4.  NOW Pervosphaeridium.  Originally Exochosphaeridium, subsequently Exochosphaeridium?, thirdly (and now) Pervosphaeridium.  Questionable assignment: Stover and Evitt (1978, p.154).  Age: Cenomanian.

Parent: Exochosphaeridium