Hystrichosphaeridium oligospinosum

"oligospinosum" Eisenack, 1934, p.64–65, pl.4, figs.15–18 ex Eisenack, 1938a, p.12.  Holotype: Eisenack, 1934, pl.4, fig.18, lost according to Eisenack et al. (1973, p.494).  NOW Estiastra? oligospinosa (Appendix A).  Originally Ovum hispidum subsp. oligospinosum (combination not validly published; Appendix A), subsequently Hystrichosphaeridium oligospinosum, thirdly Pulvinosphaeridium oligospinosum (Appendix A), fourthly Veryhachium oligospinosum (Appendix A), fifthly Goniosphaeridium oligospinosum (Appendix A), sixthly (and now) Estiastra? oligospinosa (Appendix A).  The name Ovum hispidum subsp. oligospinosum was not validly published in Eisenack (1934) since the specific name Ovum hispidum was not validly published.  Age: Silurian (erratic).

Parent: Hystrichosphaeridium