Bipolaribucina paradoxa

"paradoxa" (Brosius, 1963, p.41–42, pl.4, figs.1,6; text-fig.2, nos.1a–c) Lentin and Williams, 1981, p.28.  Holotype: Brosius, 1963, pl.4, fig.6; Fensome et al., 1995, fig.2 — p.1639.  NOW Distatodinium.  Originally Hystrichosphaeridium, subsequently Tanyosphaeridium, thirdly Oligosphaeridium?, fourthly (and now) Distatodinium, fifthly Bipolaribucina.  Taxonomic junior synonym: Distatodinium craterum, according to Fensome et al. (2009, p.31).  Age: late Oligocene.

Parent: Bipolaribucina