Hystrichosphaeridium robustum Sannemann 1955
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"robustum" Sannemann, 1955, p.331, pl.1, figs.6,8–9; pl.6, figs.7–9; text-figs.13,14a–c. Holotype: Sannemann, 1955, pl.6, fig.7. NOW Aldridgeisphaera? (Appendix A). Originally Hystrichosphaeridium, subsequently Baltisphaeridium (combination illegitimate; Appendix A), thirdly Multiplicisphaeridium (Appendix A), fourthly (and now) Aldridgeisphaera? (Appendix A). Junior homonym: Hystrichosphaeridium robustum Sah et al., 1970. Age: Devonian (late Givetian).
Parent: Hystrichosphaeridium
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