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Exochosphaeridium brevispinum

"Exochosphaeridium? brevispinum" Norvick, 1976, p.53, pl.4, figs.5-6.

TYPE: Holotype: Norvick, 1976, pl.4, figs.5-6.

HISTORY: NOW: Pervosphaeridium. Originally Exochosphaeridium, subsequently Exochosphaeridium?, thirdly (and now) Pervosphaeridium. Questionable assignment: Stover and Evitt (1978, p.154).

AGE: Cenomanian.


Infraspecific taxa:


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