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Appendix A

Goniosphaeridium tuberatum

"Goniosphaeridium tuberatum" (Downie, 1958, p.338, pl.17, fig.3; text-fig.3f) Welsch, 1986, p.49.

TYPE: Holotype: Downie, 1958, pl.17, fig.3.

HISTORY: 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.


Infraspecific taxa:


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