Bipolaribucina conicosa
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"conicosa" Jiabo, 1978, p.57, pl.29, figs.4-5. Holotype: Jiabo, 1978, pl.29, fig.4. NOW Impletosphaeridium. Originally Bipolaribucina, subsequently (and now) Impletosphaeridium. Age: Early Tertiary.
Parent: Bipolaribucina