Achomosphaera septata

"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