Cordosphaeridium divergens

"divergens" (Eisenack, 1954b, p.67, pl.9, figs.13–16) Eisenack, 1963b, p.262.  Holotype: Eisenack, 1954b, pl.9, fig.14.  NOW Operculodinium.  Originally Hystrichosphaeridium, subsequently Baltisphaeridium (combination not validly published, Appendix A), thirdly Cordosphaeridium, fourthly (and now) Operculodinium.  Age: early Oligocene.

Parent: Cordosphaeridium