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Hystrichogonyaulax crispa
Hystrichogonyaulax crispa (W. Wetzel, 1967) emend. Sarjeant, 1980
Now Acanthaulax. Originally Gonyaulax, subsequently Gonyaulacysta, thirdly Millioudodinium, fourthly Hystrichogonyaulax, fifthly Cribroperidinium, sixthly (and now) Acanthaulax.
Fenton, 1981, transferred this species to Cribroperidinium Neale and SarJeant, 1962. Sarjeant, 1982, retained it in Hystrichogonyaulax.
Holotype: W. Wetzel, 1967, pl.15, figs.4a-b
Age: Middle Jurassic
Now Acanthaulax. Originally Gonyaulax, subsequently Gonyaulacysta, thirdly Millioudodinium, fourthly Hystrichogonyaulax, fifthly Cribroperidinium, sixthly (and now) Acanthaulax.
Fenton, 1981, transferred this species to Cribroperidinium Neale and SarJeant, 1962. Sarjeant, 1982, retained it in Hystrichogonyaulax.
Holotype: W. Wetzel, 1967, pl.15, figs.4a-b
Age: Middle Jurassic