Operculodinium iaculigerum

"?iaculigerum" (Klement, 1960, p.57–58, pl.7, fig.10) Sarjeant, 1984a, p.171, pl.2, fig.5; text-fig.7.  Emendation: Sarjeant, 1984a, p.171, as Operculodinium? iaculigerum.  Holotype: Klement, 1960, pl.7, fig.10; Sarjeant, 1984a, pl.2, fig.5; text-fig.7; Fauconnier and Masure, 2004, pl.23, figs.4–5.  NOW Downiesphaeridium.  Originally Baltisphaeridium (Appendix A), subsequently Operculodinium?, thirdly Cleistosphaeridium, fourthly (and now) Downiesphaeridium.  Questionable assignment: Sarjeant (1984a, p.171).  Taxonomic junior synonym: Cleistosphaeridium? polyacanthum, according to Brenner (1988, p.42) — however, Islam (1993, p.84) retained Cleistosphaeridium? (as Downiesphaeridium) polyacanthum.  Age: middle Kimmeridgian.

Parent: Operculodinium