Cordosphaeridium uncinispinosum

"?uncinispinosum" de Coninck, 1969, p.32–33, pl.9, figs.6–8.  Holotype: de Coninck, 1969, pl.9, figs.6–8.  NOW Operculodinium.  Originally Cordosphaeridium, subsequently Cordosphaeridium?, thirdly Cleistosphaeridium, fourthly (and now) Operculodinium.  Questionable assignment: Stover and Evitt (1978, p.147) as a problematic species.  Age: early Eocene.

Parent: Cordosphaeridium