Gonyaulax orthoceras Appendix B

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"orthoceras" Eisenack, 1958a, p.388, pl.21, figs.3-11; pl.24, fig.1.  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, 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 Cribroperidinium orthoceras.  Age: Aptian.

Parent: Gonyaulax