Bipolaribucina tianjinensis

"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