Gonyaulacysta millioudii (Sarjeant, 1963) Sarjeant, 1966

Now Leptodinium. Originally Gonyaulax, subsequently Gonyaulacysta (combination not validly published), thirdly (and now) Leptodinium.
Combination not validly published since Sarjeant, 1966, did not fully reference the basionym.
Holotype: Sarjeant, 1963, pl.1, figs.4-7; Jan du Chene et al., 1986, pl.71, figs.4-7
Age: Oxfordian