Gonyaulax mamillifera Deflandre, 1939

Now Leptodinium. Originally Gonyaulax, subsequently Gonyaulacysta?, thirdly Millioudodinium?, fourthly Rhynchodiniopsis?, fifthly (and now) Leptodinium.

Holotype: Deflandre, 1939, pl.6, fig.1; Jan du Chêne et al., 1986, pl.72, figs.1-8
Age: Kimmeridgian