Hystrichosphaeridium erraticum
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"erraticum" Eisenack, 1954a, p.209, pl.1, figs.6–7; text-fig.7. Holotype: Eisenack, 1954a, pl.1, fig.6. NOW Visbysphaera (Appendix A). Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly (and now) Visbysphaera (Appendix A), fourthly Multiplicisphaeridium (Appendix A). Age: Silurian (late Ludlow).
Parent: Hystrichosphaeridium