Kallosphaeridium circulare

?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