Gonyaulax obscura Lejeune-Carpentier, 1946; Emendation: Lejeune-Carpentier and Sarjeant, 1981, p.4, as Gonyaulacysta? obscura.

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

Holotype: Lejeune-Carpentier, 1946, figs.3-4; Lejeune-Carpentier and Sarjeant, 1981, pl.2, figs.3-4; text-fig.2
Age: Senonian