Baltisphaeridium tiara Appendix A

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"tiara" (Klumpp, 1953, p.390-391, pl.17, figs.8-10) Downie and Sarjeant, 1965, p.97.  Holotype: Klumpp, 1953, pl.17, figs.8-9.  NOW Operculodinium.  Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Cordosphaeridium, fourthly Cleistosphaeridium, fifthly (and now) Operculodinium.  This combination was not validly published in Downie and Sarjeant (1963, p.92), since these authors did not fully reference the basionym.  N.I.A.  Age: Eocene.

Parent: Baltisphaeridium