Gonyaulacysta crassinerva Deflandre, 1939b, p.144, pl.6, fig.5 ex Sarjeant, 1967b, p.248–249. Emendation: Nøhr-Hansen, 1986, p.33, as Cribroperidinium crassinervum.

NOW Cribroperidinium. Originally Palaeoperidinium (name not validly published), subsequently Gonyaulacysta, thirdly Leptodinium, fourthly Leptodinium?, fifthly (and now) Cribroperidinium.
The name Palaeoperidinium crassinervum was not validly published in Deflandre (1939b) since the generic name Palaeoperidinium was not validly published until 1967. Williams et al. (1998, p.246) accepted Sarjeant's (1967b) indirect reference to Deflandre (1939b) as indication of a type (I.C.N. Article 40.3).

Holotype: Deflandre, 1939, pl.6, fig.5; Jan du Chêne et al., 1986, pl.70, figs.1-4
Age: Kimmeridgian