Ovoidinium ostium
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"ostium" Davey, 1970, p.353, pl.4, figs.5-6; text-fig.1B. Holotype: Davey, 1970, pl.4, fig.5. NOW Ovoidinium verrucosum subsp. ostium. Originally Ovoidinium ostium, subsequently Ovoidinium verrucosum var. ostium, thirdly (and now) Ovoidinium verrucosum subsp. ostium, fourthly Ascodinium verrucosum subsp. ostium. Lentin and Williams (1989, p.270) retained this taxon in Ovoidinium as Ovoidinium verrucosum subsp. ostium. Age: Albian-Early Cenomanian.
Parent: Ovoidinium