Impletosphaeridium bahiaense

"?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