Impletosphaeridium nenjiangense

"nenjiangense" (Gao Ruiqi et al., 1992a, p.18,24, pl.3, figs.1–9; pl.4, figs.1–7) Williams et al., 1998, p.333.  Holotype: Gao Ruiqi et al., 1992a, pl.3, fig.1.  Originally Cleistosphaeridium, subsequently Impletosphaeridium, thirdly Spicadinium (Appendix A).  Taxonomic senior synonym: Spicadinium akidoton (Appendix A), according to Mao Shaozhi et al. (1999, p.159).  Age: Campanian.

Parent: Impletosphaeridium