Aldridgeisphaera robusta subsp. fissa Appendix A

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).

Parent: Aldridgeisphaera robusta_Appendix A