Baltisphaeridium oligacanthum Appendix A

"oligacanthum" (Wetzel, 1952, p.402-405, pl.A, figs.4,7-8,11a-b; text-figs.21-25) Downie and Sarjeant, 1965, p.93.  Emendation: Wilson and Sarjeant in Sarjeant, 1984c, p.127-128, 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, thirdly Cleistosphaeridium?, fourthly Laticavodinium, fifthly (and now) Impletosphaeridium?.  This combination was not validly published in Downie and Sarjeant (1963, p.91), since these authors did not fully reference the basionym.  Age: Danian.

Parent: Baltisphaeridium_Appendix A

Infrataxon List:

"Baltisphaeridium oligacanthum subsp. complanatum Appendix A"
"Baltisphaeridium oligacanthum subsp. granulatum Appendix A"
"Baltisphaeridium oligacanthum subsp. oligacanthum Appendix A"
"Baltisphaeridium oligacanthum subsp. stella Appendix A"
"Baltisphaeridium oligacanthum subsp. velatum Appendix A"