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: Middle Cretaceous (early Late Cretaceous, according to Manum and Cookson, 1964).

Parent: Cooksoniella