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