Achomosphaera septata
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"septata" (Cookson and Eisenack, 1967b, p.253-254, pl.42, figs.6-10; text-fig.1) Stover and Evitt, 1978, p.139. 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. NOW Hafniasphaera. Originally Baltisphaeridium (Appendix A), subsequently Spiniferites, thirdly (and now) Hafniasphaera, fourthly Achomosphaera, fifthly Rivernookia. Age: Late Paleocene.
Parent: Achomosphaera