Cribroperidinium tenuitabulatum (Gerlach, 1961, p.159, pl.25, figs.10-11; text-figs.1-3) Helenes, 1984, p.124. Emendation: Sarjeant, 1984b, p.76, as Rhynchodiniopsis tenuitabulata.

Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly Millioudodinium, fourthly (and now) Cribroperidinium, fifthly Rhynchodiniopsis. Lentin and Williams (1985, p.81) retained this species in Cribroperidinium.

Holotype: Gerlach, 1961, pl.25, figs.10-11, lost according to Sarjeant (1984b, p.78.
Lectotype: Sarjeant, 1984b, pl.2, fig.3, designated by Sarjeant (1984b, p.78).
Age: mid Oligocene-Mid Miocene.