Hystrichosphaeridium mutabile

"mutabile" Sannemann, 1955, p.331, pl.5, figs.5–6; text-figs.17a–d.  Holotype: Sannemann, 1955, pl.5, fig.5.  NOW Aldridgeisphaera (Appendix A).  Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Multiplicisphaeridium? (Appendix A), fourthly (and now) Aldridgeisphaera (Appendix A).  Age: Devonian (late Givetian).

Parent: Hystrichosphaeridium