Impletosphaeridium conicosum
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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
