Baltisphaeridium apiculatum Appendix A
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apiculatum (Timofeev, 1959, p.52, pl.4, fig.3) Downie and Sarjeant, 1965, p.87. Holotype: Timofeev, 1959, pl.4, fig.3. Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium, thirdly Goniosphaeridium (combination not validly published, Appendix A). This combination was not validly published in Downie and Sarjeant (1963, p.89), since these authors did not fully reference the basionym. Age: Early Ordovician.
Parent: Baltisphaeridium
