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Cleistosphaeridium bahiaense
Cleistosphaeridium? bahiaense, (Regali et al., 1974), Lentin and Williams, 1981
NOW Operculodinium. Originally Hystrichosphaeridium, subsequently Cleistosphaeridium?, thirdly Impletosphaeridium?, fourthly (and now) Operculodinium. Questionable assignment: Islam (1993, p.85).
Holotype: Regali et al., 1974, pl.23, fig.5
Age: Eocene-Oligocene
NOW Operculodinium. Originally Hystrichosphaeridium, subsequently Cleistosphaeridium?, thirdly Impletosphaeridium?, fourthly (and now) Operculodinium. Questionable assignment: Islam (1993, p.85).
Holotype: Regali et al., 1974, pl.23, fig.5
Age: Eocene-Oligocene