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Appendix A

Pulvinosphaeridium balticum

"Pulvinosphaeridium balticum" (Eisenack, 1951, p.190, pl.3, figs.10-11) Eisenack, 1954a, p.210.

TYPE: Holotype: Eisenack, 1951, pl.3, fig.10.

STATUS: Combination not validly published: basionym not fully referenced.

HISTORY: NOW: Estiastra (Appendix A). Originally Hystrichosphaeridium, subsequently Pulvinosphaeridium (combination not validly published), thirdly Veryhachium (Appendix A), fourthly Goniosphaeridium (Appendix A), fifthly Baltisphaeridium (Appendix A), sixthly (and now) Estiastra (Appendix A).

AGE: Early Ordovician.


Infraspecific taxa:


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