Cordosphaeridium operculatum
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operculatum He Chengquan, 1991, p.166–167, pl.14, figs.4–6; text-figs.40a–b. Holotype: He Chengquan, 1991, pl.14, fig.5; text-fig.40b. He Chengquan (1991, p.166) included this species in Cordosphaeridium subgenus Tarimocystium. Age: middle Eocene.
Parent: Cordosphaeridium