Aldridgeisphaera robusta subsp. fissa Appendix A
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subsp. fissa (Sannemann, 1955, p.331, pl.6, fig.9; text-figs.14a-c) Sarjeant and Vavrdova, 1997, p.6. Holotype: Sannemann, 1955, pl.6, fig.9. Originally Hystrichosphaeridium robustum subsp. fissum, subsequently Baltisphaeridium robustum subsp. fissum (combination illegitimate, Appendix A), thirdly Multiplicisphaeridium robustum subsp. fissum (Appendix A), fourthly (and now) Aldridgeisphaera? robusta subsp. fissa. Age: Devonian (Late Givetian).Aldridgeisphaera robusta
