Cleistosphaeridium oligacanthum subsp. granulatum

"subsp. granulatum" (Wetzel, 1952, p.404, text-fig.25) Lentin and Williams, 1973, p.29.  Emendation: Sarjeant, 1984c, p.136, as Surculosphaeridium? granulatum.  Holotype: Wetzel, 1952, text-fig.25; Sarjeant, 1984c, pl.5, figs.1–3; text-fig.8.  NOW Surculosphaeridium? granulatum.  Originally Hystrichosphaeridium oligacanthum subsp. granulatum, subsequently Baltisphaeridium oligacanthum subsp. granulatum (Appendix A), thirdly Cleistosphaeridium? oligacanthum subsp. granulatum, fourthly (and now) Surculosphaeridium? granulatum.  Age: Paleocene.

Parent: Cleistosphaeridium oligacanthum