Kallosphaeridium circulare
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?circulare (Cookson and Eisenack, 1971, p.219, pl.8, fig.6) Helby, 1987, p.324–325. Holotype: Cookson and Eisenack, 1971, pl.8, fig.6. Originally Canningia, subsequently Canningia?, thirdly Batiacasphaera, fourthly (and now) Kallosphaeridium?. Questionable assignment: Helby (1987, p.324–325). Age: Middle Cretaceous, ?Turonian.
Parent: Kallosphaeridium