Impletosphaeridium tianshanense
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tianshanense (He Chengquan, 1991, p.142, pl.25, figs.4-7; text-fig.28) Williams et al., 1998, p.336. Holotype: He Chengquan, 1991, pl.25, fig.4. Originally Cleistosphaeridium, subsequently (and now) Impletosphaeridium. Age: Early Eocene.
Parent: Impletosphaeridium