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Isabelidinium extremum

Isabelidinium? extremum (Cookson and Eisenack, 1974, p.48, pl.20, fig.4) Stover and Evitt, 1978, p.109.

TYPE: Holotype: Cookson and Eisenack, 1974, pl.20, fig.4.

HISTORY: Originally Deflandrea, subsequently Spongodinium?, thirdly (and now) Isabelidinium?. Questionable assignment: Stover and Evitt (1978, p.109).

AGE: Albian-Cenomanian.


Infraspecific taxa:


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