Operculodinium severinii
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severinii (Cookson and Cranwell, 1967, p.208, pl.3, figs.1-2) Islam, 1983b, p.342. Holotype: Cookson and Cranwell, 1967, pl.3, fig.1. Originally Baltisphaeridium (Appendix A) subsequently Impletosphaeridium, thirdly (and now) Operculodinium. Age: Eocene-Oligocene.
Parent: Operculodinium