Cleistosphaeridium solidum

"?solidum" Yun Hyesu, 1981, p.43–44, pl.11, figs.9,13–14.  Holotype: Yun Hyesu, 1981, pl.11, fig.13; Fensome et al., 1991, fig.2 — p.739.  Taxonomic senior synonym: Hystrichosphaeridium (now Kiokansium) unituberculatum, by implication in Below (1982c, p.16), who considered Cleistosphaeridium solidum to be a taxonomic junior synonym of Hystrichosphaeridium recurvatum subsp. polypes (as Kiokansium polypes), which is now a taxonomic junior synonym of Hystrichosphaeridium (now Kiokansium) unituberculatum.  Questionable assignment: Yun Hyesu (1981, p.43).  Age: early Santonian.

Parent: Cleistosphaeridium