Acanthaulax crispa, (W. Wetzel, 1967a, p. 870, pl. 15, figs. 4a-b), Woollam and Riding, 1983, p.3; Emendations: Sarjeant, 1980b, p.119-120, as Hystrichogonyaulax crispa; Fenton, 1981, p.255,257, as Cribroperidinium crispum.

NOW Cribroperidinium. Originally Gonyaulax, subsequently Gonyaulacysta, thirdly Millioudodinium, fourthly Hystrichogonyaulax, fifthly (and now) Cribroperidinium, sixthly Acanthaulax.

Holotype: W. Wetzel, 1967a, pl.15, figs.4a-b.
Age: Mid Jurassic.

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Original description as Gonyaulax crispa: [Wetzel, 1967, p. 870] (Translation: LPP):

Diagnosis:
A species of Gonyaulax with nearly isometric shell and the following tabulation scheme: 4', 6'', 6''', 1p, 1''''.
The equatorial girdle furrow is laevoritatory. The longitudinal furrow is broadened on the hypotheca. The thick setting of the theca consists of low blisters.

Dimensions:
longitudinal diameter 64 µm.

Remark:
The holotype is a single find.

Affinities:
Comparison to other Gonyaulx species is prohibited by the peculiar ornamentation.

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Woollam and Riding, 1983, p. 3: Acanthaulax crispa
This species has similar intratabular ornament and therefore it is more appropriately assigned to Acanthaulax.