From Fensome et al., 2019:
Coronifera oceanica ssp. magna (Wetzel, 1955, p.35,38, figs.9–10,14) Sarjeant, 1984c, p.138–139. Emendation: Sarjeant, 1984c, p.138–139, as Coronifera oceanica subsp. magna. Holotype: Wetzel, 1955, fig.9; Sarjeant, 1984c,
pl.5, figs.4–5; text-fig.11 (two illustrations); Fensome et al., 1991, figs.1–3 — p.663; fig.1 — p.697.
Originally Hystrichosphaeridium pseudhystrichodinium subsp. magnum, subsequently Baltisphaeridium
pseudhystrichodinium subsp. magnum (Appendix A), thirdly (and now) Coronifera oceanica subsp. magna,
fourthly Coronifera pedata subsp. magna. Lentin and Williams (1989, p.77) retained this taxon as a
subspecies of Coronifera oceanica. Age: Paleocene.

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