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Hystrichosphaeridium robustum subsp. fissum

"Hystrichosphaeridium robustum subsp. fissum" Sannemann, 1955, p.331, pl.1, figs.6-9; pl.6, figs.7-8; text-fig.13.

TYPE: Holotype: Sannemann, 1955, pl.6, fig.7.

HISTORY: NOW: Aldridgeisphaera? robusta subsp. fissa (Appendix A). 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 (Appendix A).

AGE: Devonian (Late Givetian).


Infraspecific taxa:


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