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Polysphaeridium pachydermum

"Polysphaeridium pachydermum" (Cookson and Eisenack, 1960b, p.251-252, pl.38, fig.5; text-fig.5) Eisenack and Kjellström, 1975b, p.397 [al. p.922A].

TYPE: Holotype: Cookson and Eisenack, 1960b, pl.38, fig.5.

HISTORY: NOW: Dapsilidinium. Originally Hystrichosphaeridium, subsequently Polysphaeridium, thirdly Hystrichosphaeridium?, fourthly (and now) Dapsilidinium.

AGE: Oxfordian-Tithonian.


Infraspecific taxa:


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