Vulcanisphaera tuberata Appendix A
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"tuberata" (Downie, 1958, p.338, pl.17, fig.3; text-fig.3f) Eisenack et al., 1973, p.1087-1088. Holotype: Downie, 1958, pl.17, fig.3. NOW Acanthodiacrodium (Appendix A). Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly (and now) Acanthodiacrodium (Appendix A), fourthly Vulcanisphaera, fifthly Goniosphaeridium (Appendix A). Age: Early Ordovician.
Parent: Vulcanisphaera
