Impletosphaeridium conicosum

conicosum (Jiabo, 1978, p.57, pl.29, figs.4-5) Chen et al., 1988, p.7.  Holotype: Jiabo, 1978, pl.29, fig.4.  Originally Bipolaribucina, subsequently (and now) Impletosphaeridium.  Age: Early Tertiary.

Parent: Impletosphaeridium