Impletosphaeridium commixtum (Jiabo, 1978, p.61-62, pl.21, figs.3-5) Islam, 1993, p.85-86.
Holotype: Jiabo, 1978, pl.21, fig.3.
Originally Cleistosphaeridium, subsequently (and now) Impletosphaeridium.
Age: Early Tertiary.