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