Goniosphaeridium tuberatum Appendix A
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"tuberatum" (Downie, 1958, p.338, pl.17, fig.3; text-fig.3f) Welsch, 1986, p.49. 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 (Appendix A), fifthly Goniosphaeridium. Age: Early Ordovician.
Parent: Goniosphaeridium
