Cribroperidinium orthoceras

orthoceras (Eisenack, 1958a, p.388, pl.21, figs.3–11; pl.24, fig.1) Davey, 1969a, p.128–129.  Emendation: Sarjeant, 1985a, p.51,53, as Cribroperidinium orthoceras.  Holotype: Eisenack, 1958a, pl.21, fig.5; Sarjeant, 1985a, pl.1, figs.1,4; text-fig.1; Jan du Chêne et al., 1986a, pl.24, figs.7–8.  Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly (and now) Cribroperidinium, fourthly Cribroperidinium?.  Questionable assignment: Helenes (1984, p.125) and Jan du Chêne et al. (1986a, p.80) as a problematic species — however, Sarjeant (1985a, p.49) retained the species in Cribroperidinium without question.  Taxonomic senior synonym: Gonyaulax (as Cribroperidinium) edwardsii, according to Davey and Verdier (1971, p.17) — however, Below (1981a, p.39–40) and Lentin and Williams (1985, p.79) retained Cribroperidinium orthoceras.  Age: Aptian.

Parent: Cribroperidinium