Cribroperidinium downiei
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?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