Cleistosphaeridium bifide
From dinoflaj3
"?bifide" (Jiabo, 1978, p.51–52, pl.22, figs.7–16) Lentin and Williams, 1981, p.48. Holotype: Jiabo, 1978, pl.22, fig.8. NOW Sentusidinium. Originally Tenua Eisenack, subsequently Cleistosphaeridium?, thirdly (and now) Sentusidinium. Questionable assignment: Lentin and Williams (1981, p.48). Age: Early Tertiary.
Parent: Cleistosphaeridium