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Appendix A

Baltisphaeridium tiara

"Baltisphaeridium tiara" (Klumpp, 1953, p.390-391, pl.17, figs.8-10) Downie and Sarjeant, 1965, p.97.

TYPE: Holotype: Klumpp, 1953, pl.17, figs.8-9.

HISTORY: NOW: Operculodinium. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Cordosphaeridium, fourthly Cleistosphaeridium, fifthly (and now) Operculodinium.

COMMENTS: This combination was not validly published in Downie and Sarjeant (1963, p.92), since these authors did not fully reference the basionym.

ETYMOLOGY: N.I.A.

AGE: Eocene.


Infraspecific taxa:


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