Baltisphaeridium nudatum Appendix A

nudatum (Timofeev, 1959, p.53, pl.4, fig.10) Downie and Sarjeant, 1965, p.93.  Holotype: Timofeev, 1959, pl.4, fig.10.  Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium.  This combination was not validly published in Downie and Sarjeant (1963, p.90), since these authors did not fully reference the basionym.  Age: Early Ordovician.

Parent: Baltisphaeridium_Appendix A