Impletosphaeridium 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.