Bipolaribucina tianjinensis
From dinoflaj2
"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