Hystrichosphaeridium lucidum
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"lucidum" Deunff, 1959, p.25-26, pl.9, figs.80,82-83,85-89. Holotype: Deunff, 1959, pl.9, fig.82. NOW Micrhystridium (Appendix A). Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Solisphaeridium (Appendix A), fourthly (and now) Micrhystridium (Appendix A). Age: Ordovician (Caradoc).
Parent: Hystrichosphaeridium