Cleistosphaeridium regulatum

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regulatum Zhou Heyi, 1985, p.7, pl.1, figs.16–17,19–21.  Holotype: Zhou Heyi, 1985, pl.1, fig.16.  Originally (and now) Cleistosphaeridium, subsequently Impletosphaeridium, thirdly Sepispinula?.  He Chengquan et al. (2009, p.290) retained this species in Cleistosphaeridium.  Age: middle Oligocene.

Parent: Cleistosphaeridium