Cleistosphaeridium tiara
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"tiara" (Klumpp, 1953, p.390-391, pl.17, figs.8-10) Davey et al., 1969, p.16. Holotype: Klumpp, 1953, pl.17, figs.8-9. NOW Operculodinium. Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Cordosphaeridium, fourthly Cleistosphaeridium, fifthly (and now) Operculodinium. This combination was not validly published in Davey et al. (1966, p.170), since these authors did not fully reference the basionym. N.I.A. Age: Eocene.
Parent: Cleistosphaeridium
Infrataxon List: