Bipolaribucina tianjinensis
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"tianjinensis" Jiabo, 1978, p.59, pl.29, figs.13–14. Holotype: Jiabo, 1978, pl.29, fig.13. NOW Impletosphaeridium. Originally Bipolaribucina, subsequently (and now) Impletosphaeridium. Age: Early Tertiary.
Parent: Bipolaribucina