Baltisphaeridium pseudohystrichodinium ssp. magnum, (W. Wetzel, 1955), Downie and Sarjeant, 1965

Now Coronifera oceanica ssp. magna. Originally Hystrichosphaeridium pseudhystrichodinium ssp. magnum, subsequently Baltisphaeridium pseudhystrichodinium ssp. magnum, thirdly (and now) Coronifera oceanica ssp. magna, fourthly Coronifera pedata ssp. magna.

Holotype: W. Wetzel, 1955, fig.9; Sarjeant, 1984, pl.5, figs.4-5, text-fig.11A-B; Fensome et al., 1991, figs.1-3 - p.663; fig.1 - p.697
Age: Paleocene