Impletosphaeridium oligacanthum

?oligacanthum (Wetzel, 1952, p.402–405, pl.A, figs.4,7–8,11a–b; text-figs.21–25) Islam, 1993, p.86.  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.  Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Cleistosphaeridium?, fourthly Laticavodinium, fifthly (and now) Impletosphaeridium?.  Questionable assignment: Islam (1993, p.86).  Age: Danian.

Parent: Impletosphaeridium