Cleistosphaeridium uncinispinosum
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"uncinispinosum" (de Coninck, 1969, p.32-33, pl.9, figs.6-8) Sarjeant, 1981, p.123-124. Holotype: de Coninck, 1969, pl.9, figs.6-8. NOW Operculodinium. Originally Cordosphaeridium, subsequently Cordosphaeridium?, thirdly Cleistosphaeridium, fourthly (and now) Operculodinium. Age: Early Eocene.
Parent: Cleistosphaeridium