Baltisphaeridium divergens Appendix A
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"divergens" (Eisenack, 1954b, p.67, pl.9, figs.13–16) Downie and Sarjeant, 1963, p.91. Holotype: Eisenack, 1954b, pl.9, fig.14. Combination not validly published: basionym not fully referenced. NOW Operculodinium. Originally Hystrichosphaeridium, subsequently Baltisphaeridium (combination not validly published), thirdly Cordosphaeridium, fourthly (and now) Operculodinium. Age: early Oligocene.
Parent: Baltisphaeridium_Appendix A