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Acanthaulax spinosissima

Acanthaulax? spinosissima, (Deflandre, 1939a, p. 179, ex Deflandre and Cookson, 1955, p. 258), Sarjeant, 1972, p. 22.

NOW Pareodinia?. Originally Palaeoperidinium (name not validly published), subsequently Palaeohystrichophora, thirdly Acanthaulax?, fourthly Pareodinia, fifthly (and now) Pareodinia?.
Questionable assignment: Sarjeant (1972, p.22).

Holotype: Deflandre, 1939a, pl.9, fig.11.
Age: Late Jurassic.
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