Baltisphaeridium lucidum Appendix A

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"lucidum" (Deunff, 1959, p.25–26, pl.9, figs.80,82–83,85–89) Downie and Sarjeant, 1965, p.92.  Holotype: Deunff, 1959, pl.9, fig.82.  NOW Micrhystridium (Appendix A).  Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Solisphaeridium (Appendix A), fourthly (and now) Micrhystridium (Appendix A).  This combination was not validly published in Downie and Sarjeant (1963, p.90), since these authors did not fully reference the basionym.  Age: Ordovician (Caradoc).

Parent: Baltisphaeridium_Appendix A