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Polysphaeridium williamsii

"Polysphaeridium williamsii" Boltenhagen, 1977, p.41-42, pl.2, figs.6-7.

TYPE: Holotype: Boltenhagen, 1977, pl.2, fig.6.

HISTORY: NOW: Impletosphaeridium. Originally Polysphaeridium, subsequently Cleistosphaeridium?, thirdly (and now) Impletosphaeridium.

AGE: Cenomanian-Early Turonian.


Infraspecific taxa:


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