Hafniasphaera septata
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septata (Cookson and Eisenack, 1967b, p.253–254, pl.42, figs.6–10; text-fig.1) Hansen, 1977, p.16. Emendation: McLean, 1971, p.730, as Spiniferites septatus. Holotype: Cookson and Eisenack, 1967b, pl.42, fig.6; Eisenack and Kjellström, 1975b, uppermost figure — p.984w; Fensome et al., 1996, fig.1 — p.2356. Originally Baltisphaeridium (Appendix A), subsequently Spiniferites, thirdly (and now) Hafniasphaera, fourthly Achomosphaera, fifthly Rivernookia. Williams et al. (1998, p.261) retained this species in Hafniasphaera. Age: late Paleocene.
