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Hystrichosphaeridium erraticum

"Hystrichosphaeridium erraticum" Eisenack, 1954a, p.209, pl.1, figs.6-7; text-fig.7.

TYPE: Holotype: Eisenack, 1954a, pl.1, fig.6.

HISTORY: NOW: Visbysphaera (Appendix A). Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly (and now) Visbysphaera (Appendix A), fourthly Multiplicisphaeridium (Appendix A).

AGE: Silurian (Late Ludlow).


Infraspecific taxa:


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