Impletosphaeridium severinii

"severinii" (Cookson and Cranwell, 1967, p.208, pl.3, figs.1–2) Liengjarern et al., 1980, p.486.  Holotype: Cookson and Cranwell, 1967, pl.3, fig.1.  NOW Operculodinium.  Originally Baltisphaeridium (Appendix A), subsequently Impletosphaeridium, thirdly (and now) Operculodinium.  Age: Eocene–Oligocene.

Parent: Impletosphaeridium