Bipolaribucina conicosa

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

Parent: Bipolaribucina