Impletosphaeridium bifurcatum
From dinoflaj3
bifurcatum (Jiabo, 1978, p.60–61, pl.20, figs.11–12) Islam, 1993, p.85. Holotype: Jiabo, 1978, pl.20, fig.11. Originally Cleistosphaeridium, subsequently (and now) Impletosphaeridium. Age: Early Tertiary.
Parent: Impletosphaeridium