Cleistosphaeridium bifurcatum
From dinoflaj2
"bifurcatum" Jiabo, 1978, p.60-61, pl.20, figs.11-12. Holotype: Jiabo, 1978, pl.20, fig.11. NOW Impletosphaeridium. Originally Cleistosphaeridium, subsequently (and now) Impletosphaeridium. Age: Early Tertiary.
Parent: Cleistosphaeridium