Pervosphaeridium cenomaniense

cenomaniense (Norvick, 1976, p.52-53, pl.4, figs.4,8) Below, 1982c, p.27.  Holotype: Norvick, 1976, pl.4, fig.4.  Originally Exochosphaeridium, subsequently Exochosphaeridium?, thirdly (and now) Pervosphaeridium.  Age: Cenomanian.

Parent: Pervosphaeridium