Gonyaulacysta orthoceras

"*orthoceras" (Eisenack, 1958a, p.388, pl.21, figs.3-11; pl.24, fig.1) Sarjeant, 1966b, p.121.  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.  NOW Cribroperidinium.  Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly (and now) Cribroperidinium, fourthly Cribroperidinium?.  Taxonomic senior synonym: Gonyaulax (as Cribroperidinium) edwardsii, according to Davey and Verdier (1971, p.17) - however, Lentin and Williams (1985, p.79) retained Gonyaulacysta (as Cribroperidinium) orthoceras.  Age: Aptian.

Parent: Gonyaulacysta