Hystrichosphaeridium bahiaense
From dinoflaj3
"bahiaense" Regali et al., 1974, p.289–290, pl.23, fig.5. Holotype: Regali et al., 1974, pl.23, fig.5. NOW Operculodinium. Originally Hystrichosphaeridium, subsequently Cleistosphaeridium?, thirdly Impletosphaeridium?, fourthly (and now) Operculodinium. Age: Eocene–Oligocene.
Parent: Hystrichosphaeridium