Aldridgeisphaera robusta subsp. robusta Appendix A
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subsp. robusta. Autonym. Holotype: Sannemann, 1955, pl.6, fig.7. Originally Hystrichosphaeridium robustum subsp. robustum, subsequently Multiplicisphaeridium robustum subsp. robustum, thirdly (and now) Aldridgeisphaera? robusta subsp. robusta. Parent: Aldridgeisphaera robusta