"Cleistosphaeridium? williamsii" (Boltenhagen, 1977, p.41-42, pl.2, figs.6-7) Lentin and Williams, 1981, p.51.
TYPE: Holotype: Boltenhagen, 1977, pl.2, fig.6. HISTORY: NOW: Impletosphaeridium. Originally Polysphaeridium, subsequently Cleistosphaeridium?, thirdly (and now) Impletosphaeridium. Questionable assignment: Lentin and Williams (1981, p.51). AGE: Cenomanian-Early Turonian.
Infraspecific taxa: Go up one level. DINOFLAJ (c) 1998 |