Impletosphaeridium regulatum (Zhou Heyi, 1985, p.7, pl.1, figs.16-17,19-21) Williams et al., 1998, p.335.

NOW Cleistosphaeridium. Originally (and now) Cleistosphaeridium, subsequently Impletosphaeridium, thirdly Sepispinula?.

Holotype: Zhou Heyi, 1985, pl.1, fig.16.
Age: mid Oligocene.