Cyclonephelium downiei
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"downiei" (Sarjeant, 1960a, p.138) Ioannides et al., 1977, p.451. Holotype: Downie, 1957, pl.20, fig.10, as Hystrichosphaeridium pattei; Jan du Chêne et al., 1986a, pl.3, figs.7-9. NOW Cribroperidinium?. Originally Baltisphaeridium (Appendix A), subsequently Acanthaulax, thirdly Acanthaulax?, fourthly Cyclonephelium, fifthly (and now) Cribroperidinium?. Age: Kimmeridgian.
Parent: Cyclonephelium