Baltisphaeridium septatum Appendix A
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"septatum" Cookson and Eisenack, 1967b, p.253–254, pl.42, figs.6–10; text-fig.1. Holotype: Cookson and Eisenack, 1967b, pl.42, fig.6; Eisenack and Kjellström, 1975b, uppermost figure — p.984w; Fensome et al., 1996, fig.1 — p.2355. NOW Hafniasphaera. Originally Baltisphaeridium, subsequently Spiniferites, thirdly (and now) Hafniasphaera, fourthly Achomosphaera, fifthly Rivernookia. Age: late Paleocene.
Parent: Baltisphaeridium_Appendix A