Leptodinium perforans

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"?perforans" (Cookson and Eisenack, 1958, p.30-32, pl.2, figs.1-4,7-8; text-figs.8-9) Stover and Evitt, 1978, p.170.  Holotype: Cookson and Eisenack, 1958, pl.2, fig.1; text-figs.8-9; Jan du Chêne et al., 1986a, pl.32, fig.2.  NOW Cribroperidinium?.  Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly Leptodinium?, fourthly Rhynchodiniopsis, fifthly Cribroperidinium, sixthly (and now) Cribroperidinium?.  Questionable assignment: Stover and Evitt (1978, p.69).  Age: Late Jurassic.

Parent: Leptodinium