Gonyaulacysta ambigua
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"ambigua" (Deflandre, 1939b, p.144, pl.6, fig.2) Sarjeant, 1969, p.8. Holotype: Deflandre, 1939b, pl.6, fig.2; Jan du Chêne et al., 1986a, pl.68, figs.1–3. NOW Leptodinium. Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly Millioudodinium, fourthly Rhynchodiniopsis, fifthly (and now) Leptodinium. This combination was not validly published in Sarjeant (1966b, p.130), since that author did not fully reference the basionym. Age: Kimmeridgian.
Parent: Gonyaulacysta