Cribroperidinium downiei

?downiei (Sarjeant, 1960a, p.138–139) Poulsen, 1996, p.77.  Holotype: Downie, 1957, pl.20, fig.10, as Hystrichosphaeridium pattei; Jan du Chêne et al., 1986a, pl.3, figs.7–9.  Originally Baltisphaeridium (Appendix A), subsequently Acanthaulax, thirdly Acanthaulax?, fourthly Cyclonephelium, fifthly (and now) Cribroperidinium?.  Questionable assignment: Poulsen (1996, p.77).  Age: Kimmeridgian.

Parent: Cribroperidinium