Cleistosphaeridium oligacanthum subsp. oligacanthum

"subsp. oligacanthum".  Autonym.  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.  Now redundant.  Originally Hystrichosphaeridium oligacanthum subsp. oligacanthum, subsequently Baltisphaeridium oligacanthum subsp. oligacanthum (Appendix A), thirdly Cleistosphaeridium? oligacanthum subsp. oligacanthum. Parent: Cleistosphaeridium oligacanthum