Cyclonephelium downiei

"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