Gonyaulacysta margaritifera

"margaritifera" (Cookson and Eisenack, 1960a, p.5-6, pl.2, figs.1-2; text-fig.1) Sarjeant, 1966b, p.131.  Holotype: Cookson and Eisenack, 1960a, pl.2, fig.1; Jan du Chêne et al., 1986a, pl.54, fig.6.  Combination not validly published: basionym not fully referenced.  NOW Impagidinium.  Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta (combination not validly published), thirdly Leptodinium, fourthly (and now) Impagidinium.  Age: Campanian.

Parent: Gonyaulacysta