Oligosphaeridium xinjiangense
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xinjiangense He Chengquan, 1991, p.133–134, pl.26, figs.15–16; pl.59, figs.5–6; text-fig.23. Holotype: He Chengquan, 1991, pl.26, fig.16; text-fig.23. Age: Paleocene–middle Eocene.
Parent: Oligosphaeridium