Cleistosphaeridium oligacanthum
"?oligacanthum" (Wetzel, 1952, p.402–405, pl.A, figs.4,7–8,11a–b; text-figs.21–25) Davey et al., 1969, p.16. Emendation: Wilson and Sarjeant in Sarjeant, 1984c, p.128, as Laticavodinium oligacanthum. Holotype: Wetzel, 1952, pl.A, fig.8; Sarjeant, 1984c, pl.2, figs.4–5; text-fig.2; Fensome et al., 1995, figs.1–5 — p.1625; Dietz et al., 1999, text-fig.6g. NOW Impletosphaeridium. Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Cleistosphaeridium?, fourthly Laticavodinium, fifthly (and now) Impletosphaeridium?. Questionable assignment: Davey et al. (1969, p.16). This combination was not validly published in Davey et al. (1966, p.170), since these authors did not fully reference the basionym. Age: Danian.
Parent: Cleistosphaeridium
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