Impletosphaeridium bahiaense
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"?bahiaense" (Regali et al., 1974, p.289-290, pl.23, fig.5) Islam, 1993, p.85. Holotype: Regali et al., 1974, pl.23, fig.5. NOW Operculodinium. Originally Hystrichosphaeridium, subsequently Cleistosphaeridium?, thirdly Impletosphaeridium?, fourthly (and now) Operculodinium. Questionable assignment: Islam (1993, p.85). Age: Eocene-Oligocene.
Parent: Impletosphaeridium