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Hystrichosphaeridium laevigatum

"Hystrichosphaeridium laevigatum" (T.R. Lister, 1970, p.66, pl.6, figs.10-12; text-figs.18,20d) Eisenack and Kjellström, 1975b, p.652b.

TYPE: Holotype: T.R. Lister, 1970, pl.6, fig.10.

HISTORY: NOW: Dilatisphaera (Appendix A). Originally (and now) Dilatisphaera (Appendix A), subsequently Hystrichosphaeridium.

AGE: Silurian (Wenlock).


Infraspecific taxa:


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