Pareodinia spinosissima

?spinosissima (Deflandre, 1939a, p.179, pl.9, fig.11 ex Deflandre and Cookson, 1955, p.258) Wiggins, 1975, p.107.  Holotype: Deflandre, 1939a, pl.9, fig.11.  Originally Palaeoperidinium (name not validly published), subsequently Palaeohystrichophora, thirdly Acanthaulax?, fourthly Pareodinia, fifthly (and now) Pareodinia?.  Questionable assignment: Stover and Evitt (1978, p.117) and Below (1990, p.66) as a "nomen dubium".  The name Palaeoperidinium spinosissimum was not validly published in Deflandre (1939a) since the generic name Palaeoperidinium was not validly published until 1967.  Age: Late Jurassic.

Parent: Pareodinia