Gonyaulax amabilis Deflandre, 1939; Emendation: Kunz, 1990, p.18-19, as Leptodinium amabile.

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

Holotype: Deflandre, 1939, pl.6, fig.8; Jan du Chêne et al., 1986, pl.69, figs.1-3
Age: Kimmeridgian