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Cleistosphaeridium spinosum

"Cleistosphaeridium? spinosum" (Boltenhagen, 1977, p.54-55, pl.7, figs.1a-b,2,3a-b,4a-b,5a-b) Lentin and Williams, 1981, p.51.

TYPE: Holotype: Boltenhagen, 1977, pl.7, figs.1a-b.

HISTORY: NOW: Circulodinium. Originally Chytroeisphaeridia, subsequently Cleistosphaeridium?, thirdly (and now) Circulodinium. Questionable assignment: Lentin and Williams (1981, p.51).

AGE: Cenomanian-Turonian.


Infraspecific taxa:


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