Impletosphaeridium regulatum
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"regulatum" (Zhou Heyi, 1985, p.7, pl.1, figs.16–17,19–21) Williams et al., 1998, p.335. Holotype: Zhou Heyi, 1985, pl.1, fig.16. NOW Cleistosphaeridium. Originally (and now) Cleistosphaeridium, subsequently Impletosphaeridium, thirdly Sepispinula?. Age: middle Oligocene.
Parent: Impletosphaeridium