Cooksoniella scheii
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"scheii" (Manum, 1963, p.56-58, pl.1, figs.1-16; text-fig.1) Lentin and Williams, 1973, p.31. Holotype: Manum, 1963, pl.1, figs.1-4; text-fig.1. NOW Arvalidinium. Originally Deflandrea, subsequently Cooksoniella, thirdly Chatangiella?, fourthly (and now) Arvalidinium. Age: mid Cretaceous (early Late Cretaceous, according to Manum and Cookson, 1964).
Parent: Cooksoniella